Gutierrez also hurt his wrist in the fifth-inning collision, but was feeling better after the game and said he hopes to play Friday in Oakland when the Mariners open a three-game set with the A's in their final road series of the season.
"It was pretty much the head more than the wrist," he said. "I had a concussion before, so now hitting the wall, it was more like precautionary stuff. But I think I'm going to be fine for tomorrow."
Gutierrez stayed in the game for the final two outs of the fifth after assistant trainer Rob Nodine and manager Eric Wedge went out to check on him when he went down in a heap, but didn't return to the field the following inning.
"He has no fear of the wall," said Wedge. "He never has. He went into that thing hard and still held onto the ball. That was a big play for us. You just have to love the way he plays out there in center field. He doesn't take any mind to his body or what the repercussions are going to be. He's going after the baseball."
The 2010 AL Gold Glove winner has been plagued by injuries the past two years and was playing just his 38th game of the season after spending two long stints on the disabled list with a partially torn pectoral muscle and then a concussion.
Gutierrez has played well when healthy and is hitting .259 with four home runs and 17 RBIs in 143 at-bats. He had the presence of mind to toss the ball to right fielder Casper Wells after going to the ground, with Wells throwing back in and nearly doubling Chris Iannetta off first base.
"He hit the wall hard," said Wells. "I'm glad he came up with the catch. There wasn't time for me to yell 'wall' or anything, it was just an all-out thing. After he hit, I was yelling 'Guti, Guti' so he'd throw me the ball, because I could see he wasn't going to get up any time soon.
"He's got some bad luck going his way all the time, but he goes all out, he plays the game hard and that's what happens when you go all out. Sometimes you get hurt."
Gutierrez said the angle of the center-field wall made the play a little tougher.
"This ballpark is kind of weird with the wall there," he said. "He hit it pretty good with that line drive. I don't even know how I caught that ball, for real, I just ran hard like I always do. But I'm glad I did because they could have scored some runs there."