Red Sox starter Eduardo Rodriguez is headed to the 10-day disabled list with a right knee subluxation.

Rodriguez sustained the injury when he slipped in the bullpen during warmups prior to Thursday night’s 7-5 loss in Baltimore.

The 24-year old lefty, who allowed seven runs on four homers in that game, is 4-2 with a 3.54 ERA.

Rodriguez had knee issues last year and slipped on a mound in winter ball, too.

“I’ve been working this offseason and spring training and all the season so things like that doesn’t happen anymore. It happened again, so I just got to wait and see what the plan is after seeing the doctor,” Rodriguez said Friday.

Red Sox skipper John Farrell said Rodriguez told him what had happened in the bullpen and monitored his progress every inning.

“It was his second to last pitch in which he was warming up. He did get up and throw another ten in the bullpen after he regrouped out there. When he came in, he was very forthright on what took place,” Farrell said.

Dave Dombrowski, Red Sox president of baseball operations, said that Rodriguez will get a second opinion on his knee on Monday.

“It’s the same injury he’s had in the past basically with his knee and his knee cap. So we decided it was the best thing to do,” Dombrowski said Friday. “We’re hopeful it will be a short-term diagnosis, but only time will tell.”

To fill his spot on the 25-man roster, the club recalled right-handed pitcher Brandon Workman from Triple-A Pawtucket.

The Associated Press and ESPN’s Scott Lauber and Eddie Matz contributed to this report.