"I've had the fortune of having De Leon since he walked into the (Astros') academy in the Dominican," Rodney Linares said. "He's always had a great arm, but he profiled better as a shortstop. Down the road, his hitting didn't come along, but his arm was still there. ... A guy who can throw anywhere from 94 to 99 mph is a pretty special arm."Linares goes on to praise the improvements De Leon has made in his slider.
De Leon says he has improved his ability to locate his fastball and has added another pitch to his arsenal.
"I throw my change-up now — it's good for me," De Leon said. "My change-up. My slider. Everything."