BALTIMORE—Orioles first baseman Ryan Mountcastle was placed on the seven-day concussion injured list, retroactive to Saturday, before Sunday’s game.

Mountcastle left Friday night’s game after two innings. He was trying to steal second and was hit in the head when tagged out.

“Disappointing, I talked to him this morning. He’s feeling a lot better today,” manager Brandon Hyde said. “He’s trending in the right direction. Concussions are serious, and we’re taking it seriously.”

Mountcastle is batting .264 with 19 home runs and 63 RBIs.

“We’re making sure he’s going to be OK. He’s following the protocol with the tests and checking in every day and making sure that symptoms are going down and, hopefully, he’s going to be OK soon.”

The Orioles recalled left-handed pitcher Alexander Wells from Triple-A Norfolk. Wells was sent back to the Tides after he allowed six runs on seven hits in 2 1/3 innings in Tuesday’s 13-1 loss to the New York Yankees.

Monday is a day off, and the Orioles will reassess their roster before Tuesday’s game against Detroit.

Catcher Pedro Severino won’t be going on the 10-day injured list, Hyde said. Severino bruised his right knee bruise in Saturday night’s game and was replaced by Austin Wynns.

Infielder Ramón Urías is being rested because of upper leg soreness.

Infielder Domingo Leyba has cleared waivers and accepted an outright assignment to Triple=A Norfolk.