Rodriguez hurt his thumb on Sunday when he tried to backhand a ball hit by Joe Mauer. X-rays taken before Tuesday's game revealed no fracture and he was diagnosed with a sprained thumb. He is listed as day-to-day.
"I just kind of stepped on it, it swelled up a little bit," Rodriguez told reporters (via the Star-Ledger). "Hopefully, it's just a day."
Rodriguez was 0-for-5 in his first game after missing five weeks with a tear of the meniscus in his right knee. He was replaced by Eric Chavez in the Yankees' lineup against Oakland's Brandon McCarthy.
Rodriguez took early batting practice before Tuesday's game at Yankee Stadium, but said he wasn't able to go.
In other A-Rod news, Rodriguez also told reporters that he would meet with Major League Baseball on Friday about his alleged participation in illegal poker games.
"I'll be talking to you guys on Friday afternoon," Rodriguez told reporters (via ESPNNewYork.com). "I can't wait."
It's unlikely Rodriguez will be disciplined in the matter.For more baseball news, rumors and analysis, follow @eyeonbaseball on Twitter or subscribe to the RSS feed.