This story has been corrected. Read below
Rodriguez hurt himself while running out a grounder. A-Rod will have an extra day to recover because the Yankees are off Monday.
"I'll get some rest, wake up and see how it feels," he said. "I'll treat it all day. I have a heat pad, sleep on that, then ice it, and do treatment all day and let it roll."
Rodriguez reached first base on a fielder's choice and left after one pitch, thanks in part to some heads-up work by first base coach Tony Pena.
"I felt it a little bit in my swing, then probably four or five steps out of the box, I felt a little twinge," Rodriguez said. "I give Tony a lot of credit. He knew that if I had to go first to third on a double that perhaps I could have hurt it very seriously."
It's the first time since high school Rodriguez had such an injury. Asked how long he expected to be out, the third baseman replied, "I haven't had an injury like this in a long time, so I'm hoping no time in a perfect world. Let's see how I wake up."
Earlier in the game, Rodriguez hit an RBI double and scored.
Information from The Associated Press was used in this report.
In an April 20 story about an injury to Alex Rodriguez of the New York Yankees, The Associated Press erroneously reported that Rodriguez and Josh Hamilton of Texas were the only AL players to start every game this season. Many other AL players had also started every game.