High leg kick, knee all the way to chin; loose arm action; tall frame, ideal pitcher's body; creates great downward plane; throws with little to no effort in delivery.
Palm Beach Cardinals (High A, Cardinals)
45, middle reliever
Strong velo generated from easy arm action and tall frame; fastball sits 92-94 mph, but can reach mid-90's when he overthrows with more effort in delivery; pitch features some arm-side run but not enough to miss bats; throws strikes but repeatedly misses within the strike zone, below average present command;
Sharp break, but not big; present command is poor, consistently holds the pitch too long and pulls it down into the dirt; pitch is inconsistent but shows plus potential; when he threw it for a strike it showed plus break; command needs much improvement.
Pitch shows good arm-side fade which gives it a chance to be an average pitch, but is thrown too firm; erratic command, most were missed down in the dirt;
Jenkins looks the part of a premium pitching prospect, with a tall, lean, athletic body and lose, free arm action. The velocity matches the description, with a low-to-mid 90's fastball coming out with virtually no effort in the delivery. The command is below average, as he presently throws a ton of bad strikes. With his combination of velocity and strong downward plane, however, the lack of command is the only thing keeping it from being a plus pitch.
The same can be said about his slider, which flashed the ability to tie up right-handed hitters but severely lacked consistency. He simply didn't throw nearly enough of them for strikes for hitters to have to worry about. It's another potential plus pitch, but the gap between present utility and ceiling is large. His change-up doesn't have the same ceiling as the slider, with too far to go and not as good of a feel for the pitch, but it does generate some movement, which gives it a chance to have some utility.
Despite being in his fifth professional season, Jenkins still lacks experience and it shows. The package shows the potential for a mid-rotation starter if the change-up can develop into something hitters have to factor in, but more likely is a role as a reliever. The slider could be a real weapon against right-handed hitters if he can be more consistent with it, and he has the potential to add a few ticks of velocity to his fastball if he puts a little more effort in his delivery in short stints. All of that adds up to a potential reliever, and if he does end up with two plus pitches, he could find himself in high-leverage situations.