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4/20/2013 11:40 P.M. ET

With Lannan on DL, Phillies have yet to name starter

PHILADELPHIA -- The Phillies still haven't revealed who their starting pitcher will be for Monday night's game against the Pirates, as a result of a vacancy created when left-hander John Lannan was placed on the 15-day disabled list with a strained left knee.

Manager Charlie Manuel said a couple factors will be involved.

"Probably who they feel like is pitching the best at Triple-A or who is best suited for it," Manuel said. "Who we're playing might have something to do with it, too."

The situation is complicated for a couple reasons. Based strictly on stats, left-hander Adam Morgan (1-0, 1.42 ERA) has had the most success early for Triple-A Lehigh Valley. But Morgan pitched Thursday and isn't on the 40-man roster.

Jonathan Pettibone would be pitching on his regular turn, but is 0-1 with a 9.64 ERA in two starts. Tyler Cloyd hasn't pitched since last Monday, but is 0-2, 7.07. And Ethan Martin and B.J. Rosenberg were both scheduled to pitch in the IronPigs' doubleheader against Buffalo on Saturday night.

However, it may or may not be significant that Zach Miner started the nightcap instead of Rosenberg (0-0, 6.00).

Howard remains on bench with sore groin

PHILADELPHIA -- First baseman Ryan Howard was out of the starting lineup with a sore groin for the second straight game Saturday night against the Cardinals, but manager Charlie Manuel expects him to be ready to play in Sunday night's nationally-televised series finale.

"He's feeling better, but we decided to give him another day. He's still got some stiffness and soreness, but more than likely he'll be able to go [Sunday]," Manuel said.

Howard has one home run and five RBIs in 62 at-bats this season, but Manuel reacted strongly when asked if he might drop him out of the cleanup spot in order to be able to slot the right-handed-hitting Michael Young between lefties Chase Utley and Howard.

"I don't think so right now," Manuel said. "First of all, I think we've got to get Ryan going. I think we've got to have Ryan's power in our lineup. He is our big RBI guy.

"Guys are always talking to me about dropping him down. That'll be the day when somebody knocks in 130 runs. Or 120. I haven't seen anybody out here who can do that yet. That's kind of how I look at it. We can talk about it and go all around any way we want to."

Manuel pointed out that even though injuries limited Howard to 71 games last season, he still had 14 homers and 56 RBIs.

"It's just a matter of getting him going. I think that's the biggest thing," Manuel said. "We need to get Howard hitting like he has in the past. The last couple years, he's been hurting and he hasn't gotten back yet."

Galvis finds new role to ease veterans' burden

PHILADELPHIA -- It wasn't that long ago that manager Charlie Manuel was worried about not getting enough playing time for Freddy Galvis. The utility man had just three pinch-hit at-bats in the first 10 games.

That has changed dramatically. Galvis has started six of eight games since then, including the last three in left field. On Thursday and Friday, he was in the outfield because of Domonic Brown's sore back. Brown returned to the lineup Saturday night, but played in right.

In the first inning, Galvis jumped at the wall and made a catch to take extra bases away from Cardinals leadoff hitter Shane Robinson.

"What Freddy does for us ... we always talk about how old our players are," Manuel said. "Freddy gives you an opportunity to rest the second baseman [34-year-old Chase Utley], the shortstop [34-year-old Jimmy Rollins] and the third baseman [36-year-old Michael Young]. That's what he does.

"If we can find playing time for him two or three times a week, that would take a lot off them. And if he can play the outfield, we might even be able to find him more playing time. Myself, I think it's very important to play Freddy because I think he's going to be a real good player."

Worth noting

• Right-hander Phillippe Aumont retired all six batters he faced in relief of starter Cliff Lee on Saturday, striking out two.

• Michael Young extended his hitting streak to 11 games with a one-out single in the bottom of the ninth.

Paul Hagen is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.