ARLINGTON --The list of injured Orioles increased by one during Thursday's 4-3 loss to the Rangers at Globe Life Park, and the latest addition might be the most serious of them all.

Left fielder Dwight Smith Jr. exited the game in the fifth, one inning after he faceplanted into the outfield wall while making a spectacular, but costly, run-saving catch.

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Smith was placed on the seven-day concussion injured list on Friday. Outfielder Anthony Santander was recalled from Triple-A Norfolk.

"He's going to be out for a while," manager Brandon Hyde said of Smith.

Hyde revealed that in addition to a possibly suffering a concussion, Smith also banged his shoulder into the wall, and he was holding his jaw while coming off the field.

"It was like a car wreck," Hyde said.

Smith stayed in Dallas on Thursday night to undergo more tests and X-rays.

Smith's collision with the wall occurred in the fourth inning. The left fielder, in an all-out sprint, tracked a long fly ball by Rougned Odor, catching the ball just in front of the padded wall in left-center. But he couldn't stop his momentum, and he crashed into the wall, before falling to the ground.

Smith held the ball in the air to show he caught it, but he took a while to get up. He was walking on his own by the time Hyde and a member of the athletic training staff reached him in deep left.

Smith was rubbing his neck as he walked off the field, but he stayed in the game. He grounded into a double play in the Orioles' fifth, but in the next half-inning, he was removed from his position in left, replaced by Stevie Wilkerson.

The at-bat is what sealed the decision.

"He kept saying he was OK," Hyde said. "Then when he ran, he started feeling like he wasn't. They checked on him on the field, I checked with him before he went out on deck. He said he's good to go. Then he started feeling light-headed."

There is never a good time to have an injury, but this one was particularly ill-timed. The Orioles lost three players the night before -- catcher Pedro Severino, infielder Jonathan Villar and outfielder DJ Stewart -- and opened play Thursday with only one healthy bench player. Villar ended up pinch-running in the ninth Thursday.

Wilkerson was the only roster addition on Thursday, replacing Stewart, who went on the 10-day injured list with a sprained ankle. The other two are day-to-day after being mostly unavailable for Thursday's game.

"We've had a lot of guys go down," Trey Mancini said. "It's been tough on us. Hopefully Dwight's OK. He made a great catch there. Unfortunately, he hit the wall really hard. It's kind of a tough series for us on the injury standpoint."

Mancini hasn't been immune to the injury bug, either, though he's been able to play through his malady. He took a foul ball off his right foot early in Wednesday's game and, with the help of some numbing cream, was able to stay in. But his foot was still sore Thursday, prompting Hyde to give him a night off from the field, slotting him in as the DH.

Mancini, who logged three hits, including a first-inning solo homer, knew not playing was not an option.

"Today it felt better but definitely not 100 percent," he said. "But it was nothing that would keep me out of the lineup."

While injuries are part of a six-month season for every team, it’s difficult for anyone to have contingency plans for so many hurt players at once. The Orioles are seemingly in for a big test.

“I think it’s time to get out of Arlington,” Hyde said. “We're going to be in bubble wrap going to the airplane.”