Reliever Justin Slaten recorded eight outs, including three outs in the eighth inning Sunday. The Red Sox won 5-4 over the Angels at Fenway Park.

Manager Alex Cora had bulk reliever Chase Anderson warming behind Slaten in the eighth inning. Cora stuck with Slaten after Mike Trout led off the inning with a triple and scored on Taylor Ward’s groundout to shortstop.

Where was right-handed setup man Chris Martin who typically pitches the eighth inning with a lead of three runs or fewer?

Martin’s left shoulder (non-pitching arm) has been bothering him.

“Try to stay away from him,” Cora said. “We don’t want him to try to do something mechanic-wise to get to where he needs to go and then something happens with him. In that situation, it was Slaten.”

Martin had a rare late-inning meltdown Wednesday when he allowed four runs (three earned) in one inning against the Orioles. He has not pitched since then.

“The last few days he’s been dealing with it,” Cora said. “So we’ll see how he wakes up tomorrow, how he feels. But we have to make sure this is right for his mechanics to be right. We don’t want him to hurt his right shoulder because he can’t get to where he wants to go to.”

Cora said it didn’t happen during his outing Wednesday.

“Just felt it during the week,” Cora added. “He said it’s been going on and off for his whole career kind of. He jokes around like that. But it’s been bothering him the last few days and we have to be smart about it.”