Mark Kotsay was acquired as insurance for the Sox.

The Journal / Gretchen Ertl

ST. PETERSBURG, Fla. — With Mike Lowell sidelined for the ALCS, Mark Kotsay has reported for duty.

Kevin Youkilis is set to move across the diamond and take Lowell’s place at third base and Kotsay will get the call at first base. Kotsay made just four starts at first for the Red Sox this season, but he came through with two big plays in Game Four of the ALDS against the Angels and is looking forward to the challenge against the Rays.

“It’s such a pleasure being part of this team and being where I’m at right now in the ALCS and having this opportunity to advance to a World Series for the first time in my career,” he said. “I had that opportunity in 2006 [with Oakland] and it was immediately taken away by the Tigers in four games. Hopefully we can end up on the positive side this time.”

Kotsay is a career outfielder who hadn’t started a game at first since September 2006. While he says he’s comfortable in the infield, it certainly is not his preference.

“Being 110 feet away with guys like Cliff Floyd swinging the bat from the left side? I’d prefer being 290 feet away and have a little bit more reaction time, but I’m thrilled just to be a part of this situation and be here at the right time and be able to help out,” he said.

The Red Sox acquired Kotsay from the Braves on Aug. 27 in exchange for minor-league outfielder Luis Sumoza.

kmcnamar@projo.com