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05/27/09 10:00 PM ET

Angels recall Thompson

Right-hander will fill in for injured Shields

ANAHEIM -- For the second time this season, the Angels on Wednesday recalled reliever Rich Thompson from Triple-A Salt Lake.

Thompson was called up after reliever Scot Shields left Tuesday night's game against the Chicago White Sox when he acknowledged the pain in his left knee was too great to continue.

"I was really surprised when I got the call because Shields is a tough guy," Thompson said. "But, you always have to be ready to pitch and hope that this is your chance."

After spending parts of the last two seasons on the Angels' roster, Thompson is just hoping to make an impact any way possible.

"I am just going to try to pitch my best at my highest level and be there for the team," Thompson said.

In his last appearance with the Angels on April 24, in which he faced the Seattle Mariners, the righty recorded two outs.

For Angels manager Mike Scioscia, Thompson has the potential and ability to make an immediate difference. In three games this season, Thompson has pitched 3 1/3 innings and has an ERA of 2.70

"Rich has been around here before and really has a lot of life to his fastball," Scioscia said. "He just hasn't been able to harness it the way he can until this year."

Thompson was 2-0 with a 2.95 ERA in 18 1/3 innings pitched in 12 games with the Bees.

"Cleaning up his stuff will make him more consistent," Scioscia said. "But, he has been throwing well and I am excited to give him a look and see what he can do."

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