In a season thus far memorable for sidelined stars rather than sustained success, the Yankees anxiously awaited the test results.
"It's not frustrating, yet. We'll see. They MRI everything around here," Jeter said. "I hope it's not a big deal."
Known for trying to ignore most injuries, Jeter vowed not to this time. Sort of.
"I can't trick the tests," he said, before adding: "I always play."
He played through September and into October last year with what was called a bone bruise. The left ankle finally gave out in the ALCS opener against Detroit.
"I don't think it broke because I was 38. I think it broke because I continued to play on something that maybe I shouldn't have," Jeter said.
The possible setback is not what the Yankees were hoping for in a season also hampered by significant injuries to first baseman Mark Teixeira, Curtis Granderson and Francisco Cervelli.
"It's kind of what we went through this year," manager Joe Girardi said. "So hopefully it's nothing, it's just some leg tightness and he'll be ready to go."
Andy Pettitte (7-6) settled down after another shaky first inning to win consecutive starts for the first time since April. Lyle Overbay hit a go-ahead, two-run single in a four-run fifth against Ervin Santana (5-6) as New York overcame a 3-0 deficit and split the four-game series.
Jeter batted second in his first big-league game since Oct. 13. He said after the initial injury he would return by Opening Day, then fractured the ankle again in April during his rehab and missed the first 91 games.
Jeter turned on a 95 mph fastball in the first - "I had my mind made up that I was going to swing at the first pitch" - and sent a three-hopper up the third-base line that fell from Miguel Tejada's throwing hand. The crowd of 40,381 screamed "De-rek Je-ter! De-rek Je-ter!"
Meanwhile, injured Yankees third baseman Alex Rodriguez had his latest minor league rehab game postponed by rain. Yesterday's Class A game was called after one-half inning.
Rodriguez is expected to be interviewed by Major League Baseball investigators today as part of the probe into the closed anti-aging clinic Biogenesis, which is accused of distributing banned performance-enhancing drugs.