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MLB Pipeline ranks shortstop prospect Geraldo Perdomo as top defensive prospect in Diamondbacks system

Perdomo has the tools to be a quality defender at the shortstop position.

Naranjeros de Hermosillo v. Salt River Rafters Photo by Jill Weisleder/MLB Photos via Getty Images

Geraldo Perdomo signed for only $70k in the 2016 International Signing Period. Three years later, he’s on the cusp of the majors following a mostly successful season at the plate on the strength of more walks (70) than strikeouts (67) between two different levels of A-ball. Perdomo has physically grown this past year, now listed at 6’3” 184. While the growth isn’t showing up in the stat sheet, Perdomo is already producing MLB-average exit velocities at the plate. With that in mind, there is more growth for power down the road and possibly MLB average power tool as he continues to physically mature. I also believe that his improvements over the past couple seasons prompted the team to be more comfortable with trading Jazz Chisholm for Zac Gallen knowing they had someone who could be the shortstop of the future.

However this article is not about his bat, but his glove. MLB Pipeline released a list of each organization’s best defensive prospect, with Perdomo receiving the honors from the Diamondbacks organization. Perdomo is a natural athlete with the hands, throwing arm, and internal clock necessary to stick at the shortstop position and the growing offensive profile makes him an attractive prospect in the Diamondbacks organization. Perdomo reminds me of another switch-hitting middle infielder prospect who didn’t grow into his physical tools until long after reaching the majors: Ketel Marte. When it came to Marte and even Nick Ahmed to a degree, if the team had the patience to play them while those two eventually figured out how to better attack pitchers then they would reap the rewards. I believe the same approach will be necessary in regards to Perdomo’s offense. He’ll end up being at or below league average for his first couple years then explode around Age 24-25 when he’s filled out and has a strong idea of how pitchers are working him.

Due to the strong showing in the Fall League, I believe the team will give him a more aggressive promotion to AA instead of having him repeat High A. That speeds up his likely arrival from late in the 2021 season to potentially joining the team on Opening Day or not too long after that.