Nice frame; strong legs; muscular top; mild room for growth; mechanics are very clean; stays compact and repeats his delivery; Arm action is smooth; solid arm speed; big leg kick; good extension; solid plane; quick on the mound; quick to home plate; delivery times in 1.36-1.46 range.
Lynchburg Hillcats (High A, Braves)
No. 2 Starter
Good extension and drive; terrific plane; fastball shows late life with mild arm-side run; Plays up due to tick stutter in delivery from high leg kick; commanded the pitch well most of the night; command becomes loose when overthrows; worked it quick and pounded all corners of the plate; not afraid to attack hitters inside; room for growth into frame could provide potential uptick in velocity; already sits comfortably at 90-93
Plus pitch; 12-to-6 break; great depth; tight spin; two-plane break; Some struggles with release point but still effective; hitters struggled to pick up spin out of hand; strike-out pitch; true weapon; ability and braveness to throw in any count; ability to back-door and also wrap around hitters.
Shows some fade; decent feel; arm-side run; really drops off the table at times; inconsistent currently; velocity fluctuates; becomes firm at higher velocity; ability to replicate FB arm-speed; command is loose; fringe-average currently; Ability to throw against LHH and RHH; refinement will come from more repetition; clearly working on this pitch in games; will occasionally flash plus.
Turns 20 shortly, but pitches like he is a 24-year-old; pitchability through the roof. I absolutely loved how he attacked hitters the entire night with a bulldog mentality. Sims was determined and pissed off on the mound, but in a controlled manner. He was in charge of the game the entire night. With three pitches that could be plus, Sims is one of those starters that every team dreams of. The change lags behind the plus CB and the very underrated FB, but the pitch flashes plus and gradually improved as the game went along. Sims is advanced for his age and the only thing holding him back could be his need to build stamina and his general inexperience in professional baseball.