ST. LOUIS -- With the announcement of their 25-man roster on Tuesday for the first round of the playoffs, the Padres are now set with a 10-man pitching staff to go up against the defending National League champion Cardinals in their best-of-five National League Division Series.

That means veteran right-hander Chan Ho Park is out and Brian Lawrence, a member of the starting rotation since 2001, has been designated as the long man in relief. Chris Hammond has a lower abdomen strain, leaving manager Bruce Bochy without a left-hander in the bullpen.

"It was tough to tell Hammond he isn't on the staff, but he's hurt," Bochy said before Jake Peavy went out to face Chris Carpenter in Game 1 of the series at Busch Stadium. "If this was the regular season, he'd be on the disabled list."

With Lawrence in the bullpen, Bochy has set up his starting pitching to have Pedro Astacio in Game 2 on Thursday here and former Cardinal Woody Williams on Saturday night in San Diego. If the series extends to Game 4 on Sunday, Bochy will determine whether to go with Peavy or Adam Eaton for a possible deciding Game 5 on Monday back in St. Louis.

"It depends on how fresh Jake feels," Bochy said. "If he's OK, we'll use him. I'd be very happy to have Eaton on the mound if we go to a final game. He's a good choice."

Bochy decided to activate third baseman Sean Burroughs rather than utilize an 11-man pitching staff in the series. The Padres went with an 11- or 12-man pitching staff during the regular season.

"Burroughs will be available if something happens to [third baseman] Joe Randa," Bochy said. "And if we need more than 10 pitchers, we're in a lot of trouble."