SAN FRANCISCO -- The Giants' bullpen has reached a new low -- in age that is. With the addition of 24-year-old right-hander Brian Wilson on Tuesday, the Giants have five relievers under 27.

"We have a good time together in the bullpen," said 24-year-old reliever Jeremy Accardo. "Even the older guys are pretty young at heart. We have a good time."

Wilson was called up from Triple-A Fresno on Tuesday when right-hander Tim Worrell was placed on the 15-day disabled list with a cervical muscle strain.

"We've got enough good arms that it is not going to hurt us," Accardo said. "But you never want to see a guy go down."

With Worrell injured, Steve Kline, 33, and Armando Benitez, 33, are the "old guys" in the 'pen.

The others are Kevin Correia, 25, Scott Munter, 26, and the oldest of the five, by a month, Brad Hennessey, at 26.

The Giants' starting rotation is leading the National League with 281 2/3 innings, and the young bullpen is still looking for a consistent setup man.

But Hennessey said that if the starters keep going deep into ballgames, it will be easier for everybody to find a role.

"Our starters are throwing seven or eight innings a night, and guys can actually stay in their roles right now," Hennessey said. "We don't have to worry about who is going to be the setup man or the closer."

Hennessey started the year in the rotation and posted a 3-2 record while leading the rotation with a 2.87 ERA. The right-hander has one relief appearance, in which he held the Cubs hitless for two innings.

"I would rather be a starter, [but it is] important to help the most where I can," he said. "Unfortunately, the numbers aren't there for a six-man rotation."

Benitez is signed through 2007 and has given up only one earned run in 9 1/3 innings as the closer. But he has two blown saves, and there is talk that Wilson or Accardo could be closers in the next few years.

"There are a couple of young guys throwing hard," Hennessey said. "I know that Accardo's name has been mentioned for it. It's up in the air, you never know what is going to happen when the money frees up. They might go after a veteran closer."

Accardo said he wants to work on his split-finger fastball more in order to make himself more comfortable for that role.

"He's got a Mariano Rivera-esque cutter that I think he could use in certain situations [as a closer]," Correia said of Accardo. "I think he's going to be a good closer some day."

Roster shuffle on tap: After Wednesday's 10-4 loss to the Cardinals, Giants manager Felipe Alou said that outfielder Daniel Ortmeier and reliever Scott Munter will be sent back to the Minor Leagues.

"We're going to see if we can bring [Munter] back when he gets back that sinker," Alou said. "He's a fly-ball pitcher now. [He's] giving up fly balls, that's something that didn't happen much last year. And Ortmeier needs to play every day."

Alou did not say who would be called up from the Minor Leagues, and he has until Friday against the Rockies to fill the roster spots.

Munter came into Wednesday's game with an 0-1 record and a 5.63 ERA in 16 innings, and struggled in relief in the seventh inning. After giving up two singles, he walked the bases loaded and walked home a run. He recorded just one out and was charged with four runs in the inning.

"[Munter's] mostly a one-pitch guy," Alou said. "He has a big sinker, but he's not even there. It's off and he's wild."

Ortmeier got his first start of the season on Wednesday, and went 1-for-4 with an RBI. In 12 at-bats this season, he is batting .250 with a double and two RBIs.

Munter will be sent to Double-A Connecticut and Ortmeier to Triple-A Fresno.

Another day off: After playing five straight games, Barry Bonds was listed as a possible pitch-hitter for Wednesday against the Cardinals.

Bonds hit his 714th homer on Saturday, but has only one homer in his last 14 games.

Wednesday is an extra day of rest with the Giants being off on Thursday.

Up next: After an off-day on Thursday, the Giants will open a three-game series against the Rockies on Friday at 7:15 p.m. PT. Jason Schmidt (3-2, 3.07 ERA) is coming off a solid start that nobody will remember on Saturday against the A's, when Bonds stole the show with his 714th career homer. Schmidt held Oakland to two runs in 8 1/3 innings. Jeff Francis (3-3, 3.07 ERA) will make the start for Colorado.