For a prospect who's flown mostly under the radar (behind Syndergaard, d'Arnaud, Puello, Flores), Jacob DeGrom has put up a solid line with AAA Las Vegas.
Although I may not be telling the whole story, it appears that DeGrom limits the home run ball (.2 HR/9) and that's the reason his mediocre WHIP (1.25) stands up in the form of a pretty good ERA (3.00). Using Citi Field's spacious outfield as an advantage, I don't think he'll be giving up many more homeruns in New York as he might have in Nevada.
His arsenal consists of 92-94 mph heat with the ability to climb the ladder to 96 or 97 sparingly. He has a lot of arm-side run on his fastball, and we've heard that story before (i.e. Matt Harvey, Noah Syndergaard). He also utilizes a tight slider and a work in progress changeup (Matt Harvey has proven that even a below average changeup is a weapon when you have good other stuff). Nevertheless, DeGrom is 25 years old and is becoming a little old to be a prospect.
So does he stand to become a late-inning arm alla Bobby Parnell? Or will he join the rotation next year before Noah Syndergaard? Or will the Mets keep him in AAA for the foreseeable future as a maybe projectable replacement starter alla Collin McHugh?