Ron Cey hit a two-run homer off 300-game winner Steve Carlton and three pitchers combined on a three-hitter as the Chicago Cubs ended the Philadelphia Phillies' 11-game winning streak with a 3-0 victory today.

Nonetheless, the Phillies gained at least a tie for the National League East championship because second-place Pittsburgh lost to New York, 4-3. Philadelphia, which is 4 1/2 games ahead, can clinch if it wins one of its four remaining games or if the Pirates lose one of their last five.

Carlton (15-16) gave up only three hits in seven innings, but still lost the 200th game of his career. Last week, he became the 16th major leaguer to win 300 games.

"At least we didn't play sloppy," Philadelphia Manager Paul Owens said. "We just didn't hit."

Carlton gave up a leadoff single to Keith Moreland in the second inning. Cey then drove a 2-2 pitch to left center for his 24th homer of the year.

Rick Reuschel started for Chicago but left after two innings because of a pulled groin muscle. Steve Trout (10-14) took over in the third and allowed three hits before Lee Smith came on in the eighth and earned his league-leading 29th save. Trout had failed seven times to win his 10th game.

"He stayed ahead of the hitters, which he hadn't done against us before," Owens said.

The Cubs scored again in the eighth against reliever Willie Hernandez. Ryne Sandberg got a one-out triple and scored on a single by Bill Buckner.

The Cubs announced that shortstop Larry Bowa will miss the rest of the season.

He left early in the first inning today because of a hamstring pull and was replaced by Dave Owen.

Bowa faces arthroscopic surgery for a shoulder problem and will not accompany the club on its three-game trip to St. Louis ending the season.