"I'd hate to say it's any more than just a jammed finger," Bay said. "It's just a bad knuckle."
Bay injured the finger in similar fashion as David Wright, who fractured his right pinkie last Monday and missed three games. Not as serious as Wright's, Bay's injury occurred when he dove back to first base on a botched stolen-base attempt in the second inning on Saturday. Wright's had come diving back into first on a pickoff attempt.
After jamming his finger, Bay taped it and forgot about it until he woke up on Sunday with the joint bruised and swollen. An X-ray taken on Saturday evening was negative.
"It's just kind of day to day," he said. "I don't really know what more it is than just jamming a finger."
With Bay sidelined, Lucas Duda stepped back into the lineup, batting sixth. Duda had been scheduled to receive a routine day off, with Scott Hairston playing right field and Kirk Nieuwenhuis in center. Instead, Hairston shifted to left field and batted fifth, with Duda in right and Nieuwenhuis in center.
Bay was batting .185 in eight games with one home run, which he hit on Friday in the series opener.