The guys who are underachieving are Realmuto, Schwarber and Castellanos.
Realmuto is what I was afraid of, his offense is slipping and while his defense is top notch, if the league goes to automated strike zones (which I hope, it would improve the game over erratic umpires) that removes some of his edge there. He's not hitting well for a catcher, much less a DH.
Hoskins needs to go, he's a subpar fielding 1B on a team with no room at DH.
Bohm is struggling at 3B, but is young enough to improve.
Stott needs to be in AAA.
Didi and Segura are subpar fielders with no upside.
Camargo and Stubbs were solid bench additions, but they can't carry the load for subpar starters.
Suarez is the only SP struggling, and even then, he's pitching like a #5 instead of a #3.
The bullpen hasn't been awful, but no one has stepped up either.
SD looks like he's back, at some point the kid gloves have to come off.
Morales may be the key to the second half, he has late inning stuff if he can throw his breaking ball more consistently.
Problem is their three best pitching prospects are in A ball, not much at Lehigh or Reading.