Third base becomes Giants' revolving door

Third base has been a tough position to fill since Pablo Sandoval was shelved with a hand injury.

Conor Gillaspie was called up from Triple-A Fresno, but he was returned to the minors after a not-so-long tryout. Joaquin Arias took over the position, showing a slick glove and decent bat. But Tuesday, he took a 93-mph fastball from Jeremy Guthrie off his left forearm in the fourth inning of the Giants' 5-4 loss to Colorado.

Immediately, Arias was taken to the trainer's room in the clubhouse -- X-rays were negative, and he was diagnosed with a bruised forearm -- and Emmanuel Burriss replaced him at third.

"Day-to-day. He's getting treatment. He could play tomorrow. I don't know yet," manager Bruce Bochy said.

Good news, considering at first it seemed as if Arias broke his wrist.

So far, with Sandoval shelved, only Arias has played well enough at third to stick. Now the question is whether he'll be able to play sooner rather than later.