The Boston Red Sox continue to battle injury woes, with third baseman Rafael Devers dealing with a bone bruise in his left knee and outfielder Tyler O'Neill going on the injury list after the two collided during Monday's game.

Devers, a two-time All-Star, underwent an MRI on Thursday. He left Tuesday's game against the Cleveland Guardians with knee discomfort and served as designated hitter during Wednesday's game, going hitless in four at-bats with three strikeouts. 

"Just to make sure nothing is structurally wrong," Red Sox manager Alex Cora said of Devers getting an MRI. "He didn't feel great ... wasn't able to stand on his leg. Let's do (the MRI) so we know for peace of mind."

Cora said Devers isn't expected to go on the injured list.

O'Neill suffered a cut on his forehead that required eight stitches to close after his collision with Devers on Monday. He cleared concussion protocol but hadn't played since. The move to the seven-day IL is retroactive to Tuesday.

Devers is batting just .188 with 2 homers and 5 RBIs through 13 games this season.

Pablo Reyes started at third base and batted seventh in Thursday's matinee vs. the Guardians at Fenway Park.

In a related move, the Red Sox activated outfielder Rob Refsnyder from the injured list to take O'Neill's roster spot. Refsnyder had been on the IL with a fractured left toe since March 25.

O'Neill is hitting .313 with a team-leading seven home runs this season.

Later Thursday, Boston acquired right-hander Vladimir Gutierrez from the Milwaukee Brewers in exchange for cash considerations. The veteran arm was optioned him to Triple-A Worcester, with shortstop Trevor Story moved to the 60-day IL to make room on the 40-man roster.

The Red Sox also optioned lefty Joe Jacques to Worcester.

Boston, which put pitcher Garrett Whitlock on the IL with a left oblique strain Wednesday, begins a six-game road trip at Pittsburgh on Friday.

Field Level Media and The Associated Press contributed to this report.