Join Today! Become A Baseball America Insider

Arizona Diamondbacks

Prospects Overview

Top 10 Prospects

Click prospect for player report

Prospect Lists

Best Tools

Top Prospects of the Decade
(Listed with 2021 organization)

Top Draft Picks of the Decade
(Listed with 2021 organization)

Player Reports

  1. 1. Corbin Carroll | OF
    Corbin Carroll
    Born: Aug 21, 2000
    Bats: L Throws: L
    Ht.: 5'10" Wt.: 165
    Drafted: HS—Seattle, 2019 (1st round).
    Signed By: Dan Ramsay.

    Hitting: 60. Power: 50. Running: 70. Fielding: 60. Arm: 45.

    TRACK RECORD: Carroll was viewed as an advanced high school hitter when the Diamondbacks selected him with the 16th overall pick in 2019 and signed him for $3,745,500 to forgo a UCLA commitment. He lived up to that billing during his pro debut, hitting .299/.409/.481 as he advanced to short-season Hillsboro. Carroll opened even more eyes with his play at the alternate training site in 2020, when he excelled against far more advanced pitchers. He looked so mature in his all-around game that some wondered, albeit prematurely, if he might be the rare fast-to-the-majors high school player.

    SCOUTING REPORT: Carroll is undersized physically at a listed 5-foot-10. That gives him something in common not only with other prospects in Arizona’s system but also Mookie Betts, Andrew Benintendi and Jackie Bradley Jr., all of whom were drafted by the Red Sox under Amiel Sawdaye, who now oversees amateur scouting for the D-backs. Carroll is strong, wiry and tremendously athletic. He has a fluid lefthanded swing he uses to spray hard line drives to all fields. His approach is mature beyond his years with an innate understanding of the strike zone, an ability to recognize spin and a knack for swinging at pitches on which he can do damage. Carroll is quick to make adjustments and showed during his time at the alternate training site that pitchers couldn’t get him out the same way twice. He has plus-plus speed and gets out of the box quickly, which allows him to beat out his share of infield hits. Carroll’s raw power is impressive and he can drive balls with authority in games, but evaluators caution he might be more of a 10-15 home run-type whose speed will help inflate his slugging percentages early in his career before he grows into more power as he matures. He projects as a plus defender in center field and can shift to both corners without issue. His fringe-average arm strength is the only part of his game that leaves something to be desired. Carroll’s excellent makeup and determined work ethic create optimism he will make the most of his abilities and reach his full potential.

    THE FUTURE: Carroll has played 42 career professional games and still has much to prove—including that he can maintain his level of play across a full season—but he has fewer areas of his game that need refining than most 20-year-olds. Many D-backs officials see Carroll as the player in their system most likely to become a star, with comparisons ranging from Benintendi to Adam Eaton to Johnny Damon.

  2. 2. Daulton Varsho | C
    Daulton Varsho
    Born: Jul 2, 1996
    Bats: L Throws: R
    Ht.: 5'10" Wt.: 205
    Drafted: Wisconsin-Milwaukee, 2017 (2nd rd supp).
    Signed By: Rick Short.

    Hitting: 55. Power: 50. Running: 55. Fielding: 50. Arm: 45.

    TRACK RECORD: Varsho, the son of former major leaguer Gary Varsho, performed well at summer camp in July before earning a big league callup a week into the season. Things didn’t go well initially, but the competitiveness of Varsho’s at-bats improved as the season progressed. He posted an .822 OPS over his final 74 plate appearances, looking more like the productive hitter he was in the minors.

    SCOUTING REPORT: Like many hitters in their first big league exposure, Varsho got caught in between during many of his early at-bats and was either too aggressive or too passive. He got more comfortable as the season progressed and began showing the decisive, compact swing that has long yielded predictions of an above-average hitter with average power. Varsho is a natural catcher, but his above-average speed and surprising athleticism convinced the D-backs to try him out in center field. He played both spots in his big league debut and was passable at each. His below-average arm strength was more noticeable in the outfield than behind the plate.

    THE FUTURE: Varsho doesn’t have much left to prove in the minors, but he also doesn’t have a clear role on the 2021 big league roster. He’ll try to win a spot in spring training and carry over his strong finish from 2020.

  3. 3. Geraldo Perdomo | SS
    Geraldo Perdomo
    Born: Oct 22, 1999
    Bats: B Throws: R
    Ht.: 6'3" Wt.: 184
    Drafted: Dominican Republic, 2016.
    Signed By: Junior Noboa/Elvis Cruz.

    Hitting: 55. Power: 40. Running: 55. Fielding: 60. Arm: 55.

    TRACK RECORD: After signing for just $70,000 in 2016, Perdomo quickly looked like a bargain with his elite plate discipline and ability to play shortstop. After an impressive U.S. debut in 2018, Perdomo advanced to high Class A in 2019 and took a star turn as a 19-year-old in the Arizona Fall League. The D-backs brought him to their alternate training site in 2020.

    SCOUTING REPORT: Perdomo primarily stands out on defense but has plenty of offensive tools as well. The switch-hitter controls the strike zone, has good bat speed from both sides of the plate and has posted solid results against both lefties and righties. Mostly a singles and doubles hitter, Perdomo said he added 17 pounds of muscle to his athletic frame after the 2019 season and could still add more. Perdomo is a graceful defender who would be a slightly above-average major league shortstop right now and could be a plus defender in the future. He has soft, reliable hands and an above-average arm, while his above-average speed gives him plenty of range. Nearly fluent in English, Perdomo is viewed as a team leader.

    THE FUTURE: Perdomo is set to open 2021 at Double-A. The D-backs have Nick Ahmed signed through 2023, so Perdomo has time to develop his offensive game.

  4. 4. Kristian Robinson | OF
    Kristian Robinson
    Born: Dec 11, 2000
    Bats: R Throws: R
    Ht.: 6'3" Wt.: 215
    Drafted: Bahamas, 2017.
    Signed By: Cesar Geronimo/Craig Shipley.

    Hitting: 45. Power: 70. Running: 60. Fielding: 55. Arm: 50.

    TRACK RECORD: Robinson signed for $2.5 million in 2017 and quickly impressed the organization with his maturity, mindset and athleticism. He put together a strong season in the short-season Northwest League before a promotion to the low Class A Midwest League at age 18 in 2019, and he showed up to spring training in 2020 with a slimmed-down physique after experimenting with a paleo diet in the offseason. Robinson joined the alternate training site in August and finished the year in instructional league.

    SCOUTING REPORT: Robinson’s natural athleticism, gargantuan raw power and plus speed give him the building blocks for massive upside. He does things few players can, including hitting a home run into the Chase Field pool area in three consecutive at-bats during alternate site play. But while his power and speed are undeniable, concerns about how often he swings and misses are starting to raise questions about his ability to reach his ceiling. He projects as a fringe-average hitter who strikes out often, though he’s still young and has relatively little experience against quality pitching coming from the Bahamas. He is a potential above-average defender in an outfield corner.

    THE FUTURE: Robinson was hurt by a lack of reps in 2020. He’ll look to make up for lost time in 2021.

  5. 5. Alek Thomas | OF
    Alek Thomas
    Born: Apr 28, 2000
    Bats: L Throws: L
    Ht.: 5'11" Wt.: 175
    Drafted: HS—Chicago, 2018 (2nd round).
    Signed By: Nate Birtwell.

    Hitting: 60. Power: 45. Running: 60. Fielding: 60. Arm: 45.

    TRACK RECORD: Thomas’ father Allen is a former minor league outfielder who has spent the past 17 years as the strength and conditioning coach for the White Sox. The younger Thomas was drafted by the D-backs in the second round in 2018 and hit his way up to high Class A in his first full season. He spent the 2020 season at the alternate training site and held his own against upper-level pitchers.

    SCOUTING REPORT: Thomas packs a punch despite his undersized, 5-foot-11 frame. He has a lot going on in his swing with busy hands, a pronounced leg kick and an aggressive weight transfer, but he manages to get on time. Thomas can generate loud contact that yields extra bases, and he uses his plus speed to take the extra 90 feet. He has a chance to grow into double-digit home run power, but most of his impact will be felt in the form of doubles and triples. He has an aggressive approach but has taken steps to become more selective. In an organization filled with talented defensive outfielders, Thomas is regarded as the best of the group and a potential plus defender in center field, though his arm is a tick below-average.

    THE FUTURE: Thomas is expected to push his way to Double-A to start 2021. His game calls to mind Adam Eaton, Brett Gardner and other smaller, impactful outfielders.

  6. 6. Slade Cecconi | RHP
    Slade Cecconi
    Born: Jun 24, 1999
    Bats: R Throws: R
    Ht.: 6'4" Wt.: 224
    Drafted: Miami, 2020 (1st round supplemental).
    Signed By: Eric Cruz.

    Fastball: 60. Slider: 60. Changeup: 45. Curveball: 55. Control: 55.

    TRACK RECORD: Cecconi was an intriguing draft prospect as a high school senior, but an injury kept him off the field and steered him to Miami. He posted solid results with the Hurricanes and his stuff, presence and strike-throwing ability enticed the D-backs to draft him 33rd overall as an eligible sophomore. Cecconi quickly validated the selection with dominant showings at the alternate training site and instructional league, drawing reviews as the organization’s best pitching prospect.

    SCOUTING REPORT: Working with a prototypical 6-foot-4 pitcher’s frame, Cecconi has a methodical, under-control delivery from which he unleashes monster stuff. His fastball sits at 95 mph and touches 98 with impressive life. He backs up his heater with a wipeout slider that is another plus pitch. His curveball is a bit loopy but still gives hitters trouble, serving as a good change of speed. His changeup is a fringy offering that is a clear fourth pitch. Cecconi throws strikes and earns praise for his command, but he does have a history of leaving the ball over the plate too much or falling off as his starts wear on.

    THE FUTURE: Cecconi looked like a polished starter over the summer in 2020 but still has to show he can pitch deep into games and maintain his best stuff over a long season.

  7. 7. Bryce Jarvis | RHP
    Bryce Jarvis
    Born: Dec 26, 1997
    Bats: L Throws: R
    Ht.: 6'2" Wt.: 195
    Drafted: Duke, 2020 (1st round).
    Signed By: George Swain.

    Fastball: 55. Slider: 55. Changeup: 55. Curveball: 45. Control: 55.

    TRACK RECORD: Jarvis, the son of longtime major league pitcher Kevin Jarvis, had long been a well-regarded prospect, but his stock jumped in 2020 after he worked at Driveline and Cressey Sports Performance to add velocity and sharpen his secondary pitches. He threw a 15-strikeout perfect game against Cornell in February and became the highest-drafted player in Duke history when the D-backs took him 18th overall.

    SCOUTING REPORT: The D-backs viewed Jarvis as a polished and potentially fast-moving college pitcher after he sat 93-96 mph with plus command of his fastball and a changeup and slider that were both above-average in the spring. Jarvis exceeded expectations in the brief 2020 college season, but he crashed back to earth by struggling at the alternate training site and instructional league. He showed subpar fastball command and little deception while serving up many home runs. On the positive side, Jarvis earned high marks for his competitiveness and cerebral approach. His changeup also showed plus at its best, and he began showcasing a new curveball.

    THE FUTURE: The early indications suggest Jarvis might not be quite as close to the majors as originally believed. He’ll try to rediscover his best form with a full season in 2021.

  8. 8. Blake Walston | LHP
    Blake Walston
    Born: Jun 28, 2001
    Bats: L Throws: L
    Ht.: 6'5" Wt.: 195
    Drafted: HS—Wilmington, N.C., 2019 (1st round).
    Signed By: George Swain.

    Fastball: 55. Slider: 60. Changeup: 45. Curveball: 50. Control: 50.

    TRACK RECORD: The D-backs grabbed the projectable, athletic Walston with the second of their two first-round picks in 2019, and they were pleased with the initial returns. Walston added significant weight and strength and spent the 2020 season at the alternate training site, where he performed relatively well.

    SCOUTING REPORT: Walston has a lot of promise, but is still a young pitcher learning to maintain his best stuff. His fastball velocity can reach the mid 90s but is inconsistent, and he’s still making mechanical adjustments to get better separation between his average curveball and plus slider. His changeup remains a work in progress. Walston’s intensity level fluctuated at the alternate site, leading to speculation that the lack of true competition—of games that counted—was a detriment to his focus. Others wondered if he needed adversity to get the most of his ability. Walston also saw his command and velocity suffer when he got into the middle innings of games. He earned praise for his work and preparation off the field.

    THE FUTURE: Walston missed out on the development that comes from grinding out a full season. He should get the chance to do that in 2021 and will aim to show his best stuff on a more consistent basis.

  9. 9. Pavin Smith | 1B
    Pavin Smith
    Born: Feb 6, 1996
    Bats: L Throws: L
    Ht.: 6'2" Wt.: 210
    Drafted: Virginia, 2017 (1st round).
    Signed By: Rick Matsko.

    Hitting: 55. Power: 45. Running: 45. Fielding: 55. Arm: 55.

    TRACK RECORD: Smith was regarded as one of the best pure hitters in the 2017 draft and was selected seventh overall by the D-backs. He struggled at the start of his professional career, but turned things around midway through the 2019 season at Double-A Jackson. He pushed his way to the majors late in 2020, showing flashes of the kind of big leaguer he could become.

    SCOUTING REPORT: In many ways, Smith is the same player he was coming out of college. He has excellent strike-zone awareness, good bat-to-ball skills and sneaky solid athleticism. The D-backs believe he also has made strides in other areas. He made adjustments to allow him to better stay back and hit the bottom of the ball at the alternate training site, translating to more power. He also has “transformed himself physically,” in the words of D-backs general manager Mike Hazen, adding speed and quickness. The club now feels comfortable with him in left and right field in addition to first base, where he is above-average. Smith has an above-average arm and is a fringe-average runner.

    THE FUTURE: Smith turned in competitive at-bats during his September cameo. His ability to play the outfield increases his likelihood of impacting the 2021 roster.

  10. 10. Corbin Martin | RHP
    Corbin Martin
    Born: Dec 28, 1995
    Bats: R Throws: R
    Ht.: 6'2" Wt.: 225
    Drafted: Texas A&M, 2017 (2nd round).
    Signed By: Noel GonzalesLuna (Astros).

    Fastball: 55. Slider: 50. Changeup: 50. Curveball: 55. Control: 55.

    TRACK RECORD: Martin jumped on the fast track after being drafted by the Astros in the second round in 2017 and reached the majors in 2019. That rise was interrupted by Tommy John surgery in July 2019—less than a month before the D-backs acquired him in the Zack Greinke deal. Just as Martin was approaching a return in 2020, he suffered a strained left oblique that effectively ended his season.

    SCOUTING REPORT: Martin returned to the mound in the fall, appearing in intrasquad games and instructional league, and looked mostly like his normal self. His velocity was a tick down, ranging from 92-95 mph, but he also was not throwing at full intensity. Before surgery, Martin had a solid four-pitch mix, with his fastball complemented by a slider, curveball and changeup that all graded average to above. He’s since tinkered with a new grip on his curveball and received good feedback on it, helping solidify it as a potentially above-average pitch. He’s previously shown above-average control when healthy.

    THE FUTURE: Martin will enter spring training as one of the club’s depth starter options. He’s previously shown No. 3 or 4 starter potential but has to stay healthy and show his stuff comes all the way back.

Are you a member?

In order to access this exclusive content you must have a Baseball America Account. 

Login or sign up  

of Free Stories Remaining