NEW YORK -- Brett Gardner celebrated his 31st birthday with a lengthy visit to the trainers' room on Sunday, and the Yankees are not sure when the speedster will be able to return to the lineup.
Gardner and Jacoby Ellsbury both started Sunday's game on the bench for injury-related reasons, but the team's concern is mostly with Gardner, who fouled a ball off of his right ankle during Saturday's 5-3 win over the White Sox.
"I woke up today and it wasn't feeling too good, so hopefully it'll be better tomorrow," Gardner said. "I'm hopeful, but I'm not confident, considering how it felt today. I'm hopeful that it feels better and I play tomorrow. We'll see."
X-rays were negative, but Gardner is having trouble walking and Girardi expressed doubt that Gardner would be available to play on Monday against the Royals. He added that Ellsbury has been "pretty beat up" physically, but Ellsbury is expected to play on Monday.
"This time of year, I think everybody has something going on, but I'll be ready to go," Ellsbury said.
After starting the game on the bench with White Sox left-hander Chris Sale on the mound, Ellsbury entered the game in the seventh inning as a defensive replacement, stroking a ninth-inning single and stealing a base.
"I knew I was probably coming in at some point in the game," Ellsbury said, following his club's 7-4 victory in 10 innings. "They've been trying to get me a day off for a while. It's just one of those days where I think they wanted to get as many righties in there as possible. I was ready to go from the start of the game if they needed."
Bryan Hoch is a reporter for MLB.com. Follow him on Twitter @bryanhoch and read his MLBlog, Bombers Beat. This story was not subject to the approval of Major League Baseball or its clubs.