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06/09/11 8:56 PM ET

With Snyder out, catching depth is limited

PITTSBURGH -- Catcher Chris Snyder will have surgery on Friday morning for a herniated disk in his lower back. Snyder was placed on the 15-day disabled list on Thursday, and Triple-A catcher Wyatt Toregas was called up to replace him.

Snyder left after the second inning of Wednesday night's Pirates-D-backs game after sliding into second base in an attempt to stretch a single into a double. Snyder underwent tests later on Wednesday night.

Snyder missed time in Spring Training with low back pain and began the season on the DL.

The two catchers now on the Pirates' roster, Dusty Brown and Toregas, were Nos. 4 and 5 on the depth chart at the beginning of the season, behind Snyder, Ryan Doumit and Jason Jaramillo.

Doumit fractured his ankle on May 29 and is not expected to return until late July, at the earliest. Jaramillo has been on the DL in Indianapolis since being hit on the elbow with a pitch during the second week of May. He is not expected to return to the lineup soon.

Pirates manager Clint Hurdle said the Pirates would explore outside options for another catcher, but did not elaborate.

Toregas knows he has challenge ahead

PITTSBURGH -- Wyatt Toregas, who hadn't seen any of his Pirates teammates since Spring Training, arrived in the clubhouse earlier than most on Thursday and was greeted with hugs and handshakes as other players arrived.

Toregas got a phone call at about 1 a.m. on Thursday, telling him he'd been called up to the Majors to replace Chris Snyder. He drove from Indianapolis to Pittsburgh on Thursday morning.

"It's early June right now, and if you had asked me at the beginning of the season if I was going to be here in June, I'd be, like, 'No way,'" Toregas said. "But there were a lot of injuries, and it kind of trickled down from catcher to catcher."

In 11 appearances with Indianapolis this season, Toregas was 1-for-29. He had one stint in the big leagues in 2009, when he batted .176 with six RBIs in 19 games with Cleveland.

The Pirates must now rely on two inexperienced catchers in Toregas and Dusty Brown, who has a total of 19 games played at the Major League level over three seasons. Pirates manager Clint Hurdle said he thinks the transition at catcher is the most difficult of any position, as the catcher must quickly adapt to the pitching staff.

"The fortunate part we have is, Brown and Wyatt both caught some volume of our guys in Spring Training," Hurdle said. "[They've] practically caught all of them. So there is some familiarity."

After 12-inning game, relief corps stretched

PITTSBURGH -- After the second 12-inning game in six days for the Pirates, manager Clint Hurdle said Daniel Moskos and Daniel McCutchen would be available from the bullpen only in an emergency in Thursday's game against the D-backs.

Nearly every reliever made an appearance for the Pirates on Wednesday night. Moskos pitched the 10th inning, and McCutchen pitched the 11th and 12th.

The longest outing Thursday's starter Jeff Karstens -- a converted long reliever -- has had in 2011 was seven innings on June 3 against Philadelphia.

If Chris Resop or Joel Hanrahan were to pitch on Thursday, Hurdle said they would get the day off on Friday, so as not to pitch four days in a row, even if it meant possibly making a roster move.

"We'll piece and patch tomorrow, and see if we'll need to reload ... with another arm, based on what might happen tonight," Hurdle said on Thursday.

Hurdle also said he has a position player tabbed as an emergency reliever, should the situation ever arise, but he wouldn't say who.

"You'll see him when you need to see him," Hurdle said. "That doesn't need any attention."

Bucs Bits

• Injured catcher Ryan Doumit (ankle) transitioned to the Pirates' Spring Training facility in Bradenton on Thursday to continue his rehab. His status remains month to month, and the team said he is shooting for a potential return in late July.

• Pitcher Mike Crotta (elbow) has progressed to the bullpen portion of his throwing program. The team has not speculated about how long he will remain out.

• The Pirates did not have to arrive at PNC Park until 5 p.m. for Thursday's series finale, due to the late game on Wednesday. Several players warmed up on the field once they'd arrived, but the Pirates did not take batting practice.

• The Pirates announced on Thursday that the commemorative Chuck Tanner "7" patch, worn this season by players to honor the manager of the Pirates' 1979 championship team, would be available for fans to purchase. Tanner died February 11 at the age of 82.

Laura Myers is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.