PHILADELPHIA - As Major League Baseball's July 31 non-waiver trade deadline nears, the Phillies have another need - a center fielder.

Philadelphia is without starting center fielder Ben Revere after he broke a bone in his right foot. Revere fouled a ball off his foot in the 11th inning of a 5-4 loss to the Chicago White Sox in the first game of a day-night doubleheader Saturday.

The Phillies started John Mayberry Jr. in Revere's place Sunday. Mayberry knocked in the winning run with a bases-loaded single in the bottom off the 10th inning as the Phillies beat Chicago 4-3.

"It's tough," Revere said before Sunday's win. "I won't be out there for my teammates, but I want to be able to support them. I'm just going to keep my head held high. That's all I can do, and hopefully, like I said, this thing will heal quickly."

Philadelphia placed Revere on the 15-day disabled list Sunday. The outfielder will see a specialist today. There is speculation that Revere could be done for the season.

"It doesn't sound good," Phillies general manager Ruben Amaro Jr. said. "I don't know if it's displaced, but I think it's going to take a while."

Revere's injury is a big loss for the Phillies. He leads the team in batting with a .305 average. The Phillies acquired the 25-year-old in an offseason trade with the Minnesota Twins. Revere started slowly, batting .200 in April.

But since May 1 he's been among the top hitters in all of baseball with a .347 batting average (78-for-225).

The Phillies produced a total of 14 hits in 21 innings in the two games it has played without Revere since the injury.

Mayberry also started in center field and homered in Saturday night's 2-1, 13-inning win over Chicago.

Amaro said the Phillies would trade for a center fielder if he is an upgrade offensively or defensively over Mayberry.

"John is a good center fielder. He's solid," Amaro said. "He's not a plus-defender.

"If we can get a better one, we will."

The Phillies also are shifting minor-league second baseman Cesar Hernandez to center field to see if he can handle the position. Amaro said Hernandez was chosen for the experiment over fellow minor-leaguer Freddy Galvis because Hernandez is faster.

Hernandez, 23, appeared in nine games for the Phillies in June, batting .250 (7-for-28). He is batting .306 in 80 games with the triple-A Lehigh Valley IronPigs.

"He's going to play there exclusively for the next week to 10 days to see if that's a possibility for us," Amaro said.

Phillies manager Charlie Manuel said after Sunday's win that the team could use some outfield help.

Meanwhile, Mayberry just wants a chance to play.

"I'm ready to play every day," he said. "Charlie has proven in the past that if you're playing well and swinging the bat well, you'll be in the lineup."

Contact Michael McGarry: