ATLANTA — Another catcher is down for the Orioles.

Gary Sánchez, who exited Saturday’s game against the Braves after a collision at the plate, was placed on the injured list Sunday morning with a moderate right knee posterior cruciate ligament sprain. He is being evaluated by doctors, interim manager Tony Mansolino said, and there is no timeline yet for his return.

This is Sánchez’s second stint on the injured list after missing over a month with right wrist inflammation. After returning June 14, Sánchez hit .304 with a .953 OPS.

With their catching depth already thin, the Orioles acquired Alex Jackson from the Yankees in exchange for international signing bonus pool money and a player to be named later or cash considerations. Jackson, who was in Triple-A with the Yankees but has big league experience with the Rays, Brewers and Braves, was added to the active roster for Sunday’s series finale against the Braves.

Jorge Mateo was moved to the 60-day injured list to clear a spot on the 40-man roster.

Jackson is the sixth catcher the Orioles have had this season, a franchise record. It’ll be he and Jacob Stallings — who has been with the team for only five days — for the foreseeable future because the team is without Adley Rutschman (oblique strain), Maverick Handley (concussion) and Chadwick Tromp (lower back strain). Rutschman is progressing and is hopeful he can return after the All-Star Game, but Handley and Tromp have not done baseball activities yet.

“Those are good catchers,” Mansolino said of the Stallings-Jackson duo. “It’s guys that have the capacity to quickly catch up and make themselves assets at that position for a major league team.”

The Orioles opted to acquire Jackson instead of bringing up No. 1 prospect Samuel Basallo, because the team would rather wait until the 20-year-old is fully ready for the big leagues. He’s hitting .253 with a .919 OPS and splits his time among catcher, designated hitter and first base for Triple-A Norfolk.

This article has been updated.