Rafael Devers will get an MRI on his knee, Alex Cora announced Thursday morning.

“He didn’t feel great yesterday, he felt like he wasn’t able to stay on his leg,” the Red Sox manager said. “I talked to him last night, I said ‘Well, let’s do this so we know.’ Hopefully, it’s what we think it is and we deal with it, and (he) gets treatment, all that stuff, but I think it’s more for him to (have) peace of mind.”

The third baseman went 0-for-4 with three strikeouts in Wednesday’s 2-0 victory over the Cleveland Guardians. He only played in five of the 10 games during the first homestand, and went 2-for-16 (.125) with four walks and five strikeouts. Through 13 games overall, he’s hit .188/.328/.375 with nine hits, three doubles, two home runs, five runs and five RBI, nine walks, and 10 strikeouts.

“He played because he wanted to play,” said Cora. “Just, he wasn’t able to stay on his back leg yesterday, he was out in front. He got a fastball, I think with men on second and third, he got two fastballs that he didn’t catch up with in a spot that he usually does. Mechanic-wise, he was off.”

Devers’ health has been a roller coaster throughout the start of the season. He missed multiple games during the opening series in Seattle as well earlier in the homestand due to nagging shoulder soreness.

“He’s okay” in that regard, Cora said. “He actually felt like the night before, he took better swings.”

“He’s frustrated with the fact that he was feeling so good during spring training and the swing was on point, he made some changes and he was working, and all of a sudden, the shoulder and this knee thing,” the Sox skipper continued. “Been healthy throughout his career, right?”

Cora can’t rule out Devers joining an already-crowded injured list. “If that’s the case, that’s the case,” he said.

More Red Sox injury updates

The Red Sox placed Tyler O’Neill on the seven-day injured list Thursday (retroactive to April 16).

The seven-day IL is specifically for players dealing with concussion symptoms; earlier in the week, Cora announced that the outfielder had cleared concussion protocol following his collision with Devers during Monday’s game.

O’Neill has been the team’s most productive hitter. Entering Thursday, his seven home runs – including a homer in Seattle’s, Anaheim’s, and Boston’s home openers  – lead the Sox and rank second in the Majors, and he leads all MLB hitters in slugging percentage (.750) and OPS (1.209).

To fill O’Neill’s spot on the active roster, the Red Sox reinstated Rob Refsnyder (toe) from the 10-Day IL.

Nick Pivetta (mild elbow flexor strain) will throw his next bullpen on Saturday. “He’s doing good,” Cora said. “He feels he turned a corner. He’s gonna be okay.”

Vaughn Grissom won’t. His rehab assignment with Triple-A continues; he’ll play second base for the WooSox Thursday and Friday.

Romy Gonzalez’s MRI came back clean. “Now it’s about tolerating the pain or whatever he has going on and keep getting treatment, but as far as structurally, he’s good,” Cora said.