OAKLAND, Calif. -- The Oakland Athletics, as expected, placed second baseman Nick Punto on the 15-day disabled list Sunday.

"It's going to be every bit of two weeks and maybe a little bit longer, is my guess," A's manager Bob Melvin said before his team's 4-2 loss against Kansas City. "It's tough to tell, but he got it pretty good. Guys talk about it pulling a little bit. Other times you feel like someone shot you in the back of the leg. I think it's probably a little bit more so that for him."

Punto was injured Saturday against Kansas City in the fifth inning while rounding third base and trying to hold up. He scrambled back to the bag and left the game.

The A's called up right-handed hitting first baseman Nate Freiman from Triple-A Sacramento to take Punto's place on the roster Sunday.

With Punto on the DL, Alberto Callaspo, a switch hitter, will see more action than usual at second base. Callaspo has started 32 games at designated hitter, 19 at second base, 16 at first base and 14 at third base.

Punto also served as the A's backup shortstop, making 10 starts at that spot in place of regular Jed Lowrie. Second baseman Eric Sogard will take over that job, a role he has filled throughout much of his career. Sogard started one game at shortstop this season.

"He's going to have to do a little bit more as far as getting some ground balls," Melvin said of Sogard. "Nick was the guy we had do that, but he's done it in the past and does a nice job with it."

The A's could have called up infielder Andy Parrino but opted for Freiman, leaving them with just three middle infielders.

"We've got a couple lefties coming up," Melvin said. 'We always take a look at the roster and see based on who we're facing what the best complement of guys is, but at this point it's Freiman for now and he's done a nice job for us."

Freiman hit .274 with eight doubles, one triple, four home runs and 24 RBIs last year in 80 games for the A's. In his first stint this year with the A's, he batted .212 with one home run and six RBIs during a 14-game stretch from June 29 to July 26. In 80 games for Sacramento this season, Freiman hit .284 with 15 home runs and 74 RBIs.