there is a long quote below that addressed this. I’m not sure if Rocco deserves blame, or not… or if Maeda has been hurt all season and then Rocco should be strung up by his toes:
https://www.mlb.com/twins/news/kenta-maeda-exits-with-arm-injury-in-twins-loss
“[It’s] something he’s dealt with on and off throughout this year,” Twins manager Rocco Baldelli said of Maeda’s forearm tightness. “He pitched pretty well today up until that point. I thought he had a good start going for himself, and even in that inning, up until that point, there was really not a lot to look to or point to or think about as far as any health questions.
Though Maeda could be seen visibly shaking his throwing arm in what appeared to be discomfort as the frame unfolded, Baldelli clarified that it’s something the veteran starter has done often this season. It wasn’t, in and of itself, a distressing sign. But Maeda’s glaring command woes did concern the skipper and his staff, convincing them that they “needed to get him out of the game.”