© 2013 MLB Advanced Media, L.P. All rights reserved.

9/24/2013 7:15 P.M. ET

Day after collision, Casilla remains light-headed

Run-in with teammate Markakis may spell end to infielder's season

BALTIMORE -- Orioles infielder Alexi Casilla, a night removed from a collision in the seventh inning of Monday's game, was still feeling light-headed and foggy from an incident that could end his season.

"I still don't remember what happened," said Casilla, who dove for Wil Myers' bases-loaded blooper and hit his head on right fielder Nick Markakis' leg. "I just remember, I was in the clubhouse, and I asked myself, 'What am I doing here?' Somebody told me that I had a collision so I went to the video room and watched the replay and I was like, 'Oh my God.'"

The initial plan was for Casilla to stay in a Tampa Bay area hospital and be monitored overnight, but the Orioles opted to have him travel with them to Baltimore instead. Manager Buck Showalter, who went on to check on Casilla along with assistant athletic trainer Brian Ebel, said he regretted letting the second baseman stay in the game.

"I didn't realize how much contact. I look back on it and I probably made a mistake leaving him in there," Showalter said of Casilla, who played the remainder of the inning before he was pulled. "I let him talk me into it. He answered the right questions that the trainer had. He's a hard read, too. He's a tough kid."

Casilla, who politely declined to speak with the bright camera lights present, also sustained a right thumb injury on the play and wasn't sure how that happened. He had Myers' ball in his glove -- which would have been a fantastic catch -- but it popped out upon impact with Markakis. Casilla was unavailable Tuesday night and said he wasn't sure if he would be ready to go before the team's final regular-season game Sunday.

Told about Casilla's memory loss, Showalter said, "It was a reminder to me about getting those guys out of the game, and I've done it 99 percent of the time. For some reason, he really sold [O's assistant athletic trainer] Brian [Ebel] and I. He was right on the score, everything. He had it all wired. Then he tells you that today. Kind of tells you how the brain works, I guess. Tough kid. He almost made a hell of a play."

Worth noting

• The Orioles officially released Wilson Betemit on Tuesday afternoon.

• Before Tuesday's game, Baltimore held a moment of silence to reflect on the recent shootings at the nearby Navy Yard in Washington.

• Tuesday's homestand kicked off the club's annual Fan Appreciation Week, a six-day celebration that includes opportunities for fans to be selected at random to win unique opportunities including on-field visits, Fan of the Game contests, the popular "Shirts Off Our Backs" promotion, the chance to take the field with Orioles players for the national anthem and more.

Fans are encouraged to wear Orioles clothing and arrive at the ballpark early each day. Eutaw Street will open two hours before game time and the entire ballpark will be open 90 minutes before first pitch. On Sunday, to accommodate anticipated demand for the Chris Davis AT&T Fans' Choice Bobblehead, all gates will open two hours before game time at 11:30 a.m. ET.

Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Twitter @britt_ghiroli. This story was not subject to the approval of Major League Baseball or its clubs.