- Full name Harold Arnaldo Castro
- Born 11/30/1993 in Caracas, Venezuela
- Profile Ht.: 5'10" / Wt.: 195 / Bats: L / Throws: R
- Debut 09/23/2018
Organization Prospect Rankings
Castro looked like the next under-the-radar Venezuelan find for the Tigers, who signed him for $29,000 in March 2011. Once he got to low Class A West Michigan in 2013, he looked overmatched at the plate. He returned to the Midwest League to start 2014 and wasn't hitting well there, but by the end of May the Tigers bumped him up to high Class A Lakeland, where he performed better. Castro has a short, quick swing and good bat-to-ball skills. He hits to all fields and uses his hands well at the plate, flicking the ball to the opposite field on pitches on the outer third. Castro hit .299 in Lakeland but without a trace of secondary skills. He has an aggressive approach and minimal power. He needs to get stronger to deliver more impact and take a more selective approach to improve his on-base ability. Castro is athletic and runs above-average, but he has a fringy arm and below-average defense at second base.
When the Tigers signed Castro for $29,000 in March 2011, he weighed only 140 pounds but showed plus speed and the ability to consistently put the barrel on the ball. He continued to display those tools during a strong debut in the Rookie-level Venezuelan Summer League in 2011, which persuaded Detroit to have him make the jump to the United States in 2012. He didn't disappoint, ranking third in the Rookie-level Gulf Coast League with 14 doubles and fifth with a .311 batting average. Even with his slender frame, Castro generates good bat speed and is more than just a slap hitter. He's aggressive at the plate yet has a sound approach. He can turn on inside pitches or flick his wrists at pitches on the outer half to drive the ball to left field. He needs to get stronger and still doesn't project to have much more than gap power. Castro's speed makes him a stolen-base threat and his athleticism helps him in the field, but defense doesn't come as naturally to him as hitting. He's still raw at second base and has fringy arm strength. Castro is advanced enough to handle the jump to Class A this year at age 19.
Minor League Top Prospects
When the Tigers scouted Castro, he weighed just 140 pounds, but he showed plus speed and a knack for putting the barrel on the ball consistently. Signed for $29,000 in March 2011, he had a strong debut in the Venezuelan Summer League that persuaded the Tigers to let him make the jump this year to the GCL. He ranked fifth in the league in hitting (.311) and third in doubles (14). Though he's skinny, Castro generates good bat speed and is more than just a slap hitter. He's an aggressive hitter with a good approach who can turn on an inside pitch or flick his wrists at pitches on the outer half to drive the ball to left field. He needs to get stronger and doesn't project to have much more than gap power. Castro's plus speed makes him a stolen-base threat and his athleticism helps him in the field, but defense doesn't come as naturally to him as hitting. He's still raw at second base and has fringy arm strength.