During batting practice before tonight's Tigers/Orioles game, a line drive (or a one-hopper) off the bat of Orioles' Robert Andino drilled Al Alburquerque in the side of the head, dropping him to the ground in obvious pain (video below).
Alburquerque was conscious and responsive -- both very good initial signs -- but had to be carted off the field and taken to a nearby hospital for tests (a CT scan most importantly). As our Ian Casselberry noted, early signs indicated that Alburquerque was responding well to treatment.
Shortly into the game, the Tigers issued a tweet with an update on Alburquerque's condition, stating that he suffered a concussion when the ball struck him in the head and that he will be held overnight for further observation.
A concussion is a serious brain injury, so Alburquerque will be watched very carefully tonight and tomorrow to see how he responds to further treatment. Hopefully this won't be the kind of concussion that keeps Alburquerque out of action for too long, like the concussion-like symptoms that have kept Orioles' second baseman Brian Roberts out for most of the season.