The Yankees said a CT scan came back negative and said Cano will be day to day.
In the fifth inning against the Royals, Cano came to bat with two outs and the bases empty against reliever Nate Adcock. A 1-1 Adcock fastball hit Cano above the bill of his helmet, knocking him to the dirt in the batter's box.
Cano gathered himself, but remained on the ground. Manager Joe Girardi and team trainer Steve Donohue came sprinting from the dugout to check on him. Cano's eyes were open and he even walked down to first base as if he would stay in the game.
Girardi said Cano told him he could keep playing, but Donohue thought it was best Cano did not. Girardi ceded to his trainer's recommendation.
On the pitch, Adcock said he was trying to go inside.
"It just got away," Adcock said.
He felt bad about it, understanding the severity.
"That's dealing with somebody's life," Adcock said. "You hit them in the head, that [could] change a whole lot of things. Is it going to keep me from pitching inside? No. I'm doing what I'm doing and trying to have some success and you never want to see that happen."
Yankees starter A.J. Burnett returned the favor in the next half-inning. After a walk and an out, Burnett hit Jeff Francoeur in the upper back. With the Yankees up by only one run, it seemed like an odd time to retaliate, but the umpires didn't think it was a coincidence as they warned both benches.
"My thought process is that there is no way we are going to hit a guy to put the tying run in scoring position," Girardi said. "Just like the ball got away from their kid. I just think that Eddie [Rapuano, the plate umpire] just felt like let's just stop it there."
Even after pushing the tying run to second, Burnett escaped the inning without being harmed further. He denied that he hit Francoeur on purpose.
"The thing of it is, I know Jeff, too," Burnett said. "So, that's even worse – when you know somebody and you end up hitting him. But, you know, balls get away. I had five walks, so I wasn't exactly pinpoint."
Francoeur thought there was intention in Burnett's pitch, but he understood and appreciated that Burnett hit him professionally, in the back.
"I've got no problem with that," Francoeur said. "It's part of the game and that's how it is."
Cano is probably the Yankees' most important offensive player. He is hitting .292 with eight homers and 24 RBIs. When he got nailed his teammates took a deep breath because of what he means to their team and because of the serious effects a beaning can have.
"You never want to see anyone hit in the head," Mark Teixeira said. "That's scary."
Cano was unavailable for comment after the game.
Andrew Marchand covers the Yankees for ESPNNewYork.com. Information from ESPNNewYork.com's Kieran Darcy and Matt Ehalt and The Associated Press was used in this report.