​Outside of CC Sabathia, who has New York Yankees pitching coach Larry Rothschild actually helped in improving their ability on the mound? 

Sonny Gray has been mess, A.J. Burnett was a disaster in New York, and Ivan Nova wasn't a respectable starter until he ended up in Pittsburgh.

Yes, Luis Severino went from having a poor 2016 season where the bullpen might've been the best option, to a breakout 2017 campaign. You want to give Rothschild some credit for that? That's fine. But he's in a prolonged struggle right now and it doesn't seem like the Yankee pitching coach is doing much to help that out.

Severino might as well wait to have ​Pedro Martinez help him out.

It was odd that the​ Yankees kept Rothschild on the coaching staff when they cleaned house and then hired Aaron Boone. Yes, he has experience and you want that on a new coaching staff, but it's not Rothschild is Dave Duncan. 

There are plenty of other pitching coach options out there, and even though they wanted Boone to lean on Rothschild to handle the pitching staff, he isn't doing a very good job with the starters or the bullpen.

Look, players are the ones that play and I don't like blaming coaches for a lack of production or execution, but their jobs are to help players make the necessary adjustments to be better. That's not happening with any of the Yankee pitchers. Rothschild needs to go.