Ozzie Smith's fielder's-choice grounder in the sixth inning drove in the go-ahead run and Joe Lefebvre slammed a three-run homer in the seventh to lead the San Diego Padres to an 8-4 victory over the Phillies in Philadelphia yesterday.

Steve Mura allowed nine hits in six innings to gain his first triumph of the season after four defeats, and Gary Lucas pitched four fine innings in relief to earn his fifth save. Larry Christenson (1-3) was the loser.

The Padres broke a 4-4 tie in the sixth on Smith's run-scoring grounder. In the San Diego seventh, Gene Richards doubled and took third on a ground out and Broderick Perkins walked before Lefebvre hit a 1-0 pitch to right field for his fourth homer of the season.

San Diego jumped in front in the second inning on Barry Evan's sacrifice fly. The Phillies tied it in the bottom of the inning on Manny Trillo's RBI single.

The Padres added two runs in the third on a RBI by Richards and a run-scoring base hit by Terry Kennedy. But the Phillies tied it up again in the bottom of the third on a triple by Pete Rose and RBI singles by Bake McBride and Greg Gross. The triple for Rose was the 3,599th hit of his career, which puts him within one of second-place Hank Aaron on the National League's all-time hit list.

In the fourth, the Padres took a 4-3 lead on Smith's RBI single. The Phillies tied the score for the third time in the sixth on three straight singles by Gary Matthews, Keith Moreland and Gross.