To take Wilson's place on the roster, the Angels called up young Triple-A catcher Hank Conger, who returned from injury less than a week ago, and inserted him into the lineup against the Mariners.
Wilson said he was feeling "fatigued" and "drowsy" on Tuesday, but was confident he could return to the Angels when his DL stint is up.
Considering the concussion he suffered during a home-plate collision with the Yankees' Mark Teixeira in April 2010, and a very mild one he nursed when getting hit on a backswing in Minnesota earlier this season, the Angels needed to be cautious.
"The way he feels today or what happened, I think this will be something that hopefully he'll get over in quick order," Angels manager Mike Scioscia said. "You have to be cautious. He was feeling it a little bit last night. Today he feels better, but still not quite where he needs to be. You have to let this play out, and hopefully he'll be back with us soon."
In the top of the first on Monday night, Wilson took a foul tip off the bat of Kyle Seager, just before the Mariners' third baseman hit a solo homer. He initially stayed in the game, but was replaced by backup John Hester just before his second-inning at-bat.
"I kind of had this same feeling as I did in that collision," Wilson said. "It's kind of like your face gets really hot, and that's kind of how I knew that something was a little different. And then I started getting a little headache towards the end of the night last night."
Wilson was told to lay low for a couple days. He isn't taking any prescribed medication, though he popped a few Tylenols to ease his headaches, and was told it usually takes 3-5 days for a concussion like his to clear up.
"It could linger, but I don't feel like it will," Wilson said, adding that team physician Craig Milhouse "referred to it as was like a ding. I've had these before, but this one jarred me a little bit more than usually."
Conger returned to action at Triple-A Salt Lake last Thursday, after an awkward throw caused a right elbow strain that put him out a little more than a month. If nothing else, Conger, a 24-year-old switch-hitter who has posted a .299/.361/.468 slash line in seven years in the Minors, could provide some offense to a position that ranks 25th in the Majors in OPS.