It appears there's a good chance Yuki Karakawa (LOT) won't be able to return to the active roster during the current season. Karakawa is working his way back from right elbow pain and has yet to throw in the bullpen due to some tightness remaining in the elbow.
In other team related injury news:
Tomoya Satozaki was having problems with back pains but recently managed to begin working out with the Ni-gun team. Assuming no setbacks, Satozaki will likely get called back to the active roster after he gets a chance to play in a Ni-gun rehab game.