A commenter asked Jennings about pitching prospects Dellin Betances, Christian Garcia and Mark Melancon and this was his answer:
I wasn't at the Class A games because I traveled with the Triple-A team, but I talked to Patrick from Pinstripes Plus before the game and I know he was there. On his site he's saying Betances and Garcia were both outstanding but doesn't mention Melancon. I don't want to go into specifics because he has it as subscriber only content. Since I wasn't there, I don't want to steal his stuff. To give a general idea, though, it sounds like those two were very, very good.Betances, who has hit 99mph with his fastball as a teen, is coming back from an injury-shortened season, shutdown after less than 30 innings of work. His velocity dipped into the 89-91mph range, but he is apparently back on track, hitting 92-94 on the gun consistently and able to touch 96 at times. The question for Betances is mechanics. As long as he can consistently repeat his delivery and armslot, his stuff should flourish - as well as his health.
Garcia has all the stuff in the world to become an elite major league arm, but has been bitten by the injury bug since being drafted out of high school. He needed Tommy John and serious knee surgeries in successive years, bringing his development to a halt. If he returns to the old Garcia, he features a plus fastball in the mid-90s to go along with a devastating curveball and changeup. His career as a professional ballplayer [at least with the Yankees] may soon become a question mark since he will be eligible for the Rule V draft this year. Should he not make major steps forward, he may be out in the cold considering the bounty of talented arms the Bombers now have injected into their farm system.