The injury occurred in the third inning of Monday night's 5-0 win over the Dodgers, when Tejada moved to his right to field a ground ball hit by Rafael Furcal. Tejada committed his team-high 10th error on the play and came up noticeably hurt, leaving the field as Brandon Crawford came on to replace him.
Giants manager Bruce Bochy initially said the injury did not seem too serious -- perhaps keeping Tejada off the field a day or two -- but Tejada underwent an MRI on Tuesday.
Tejada has seen most of his time at third base and shortstop this season, though Pablo Sandoval has locked down the hot corner since returning from surgery to remove a broken hamate bone in his right hand. The Giants have several options at shortstop, including Crawford, Emmanuel Burriss, Mike Fontenot and the newly acquired Jeff Keppinger -- though they view Keppinger as more of an everyday second baseman.
After scuffling through the first two months of the season, when he batted .217, Tejada had been heating up at the plate. Since June 1, the veteran infielder has hit .286 with seven doubles, three homers and 10 RBIs.