SAN DIEGO – Brian Giles hit a grand slam and the San Diego Padres beat the New York Mets 7-4. on Sunday to salvage a split of their four-game series.

San Diego starter Clay Hensley (1-1) worked 5 1-3 innings, allowing four runs and five hits. He walked three and struck out three in his second start this season and third of his career.

The Padres scored four runs in the fourth after Mets starter Victor Zambrano (1-2) retired the first two hitters of the inning. Hensley singled, Dave Roberts walked and Josh Barfield had a base hit to load the bases for Giles, who hit his fifth career grand slam.

Giles’ second homer of the season came on a full-count pitch and made it 5-0 San Diego. It was his first grand slam since July 28, 2001, when he homered for the Pittsburgh Pirates.

Zambrano gave up five runs and seven hits in four innings. He hasn’t lasted more than five innings in any of his three starts. He struck out one and walked three.

Barfield and Vinny Castilla each had three hits for San Diego. Barfield hit a solo home run in the first and scored three times.

Trevor Hoffman worked the ninth for his third save in as many opportunities.

Mike Cameron, who was traded to San Diego by the Mets, went 0-for-3 with two strikeouts and two walks in his Padres debut. Cameron was playing for the first time since suffering multiple facial fractures in a collision with then Mets teammate and center fielder Carlos Beltran while pursuing a ball in right-center on Aug. 11, 2005, in Petco Park.

The Mets scored four runs in the sixth. David Wright drove in the first run with an infield single and Cliff Floyd followed with an RBI single to right. Endy Chavez added a two-run single to center before Alan Embree struck out Kaz Matsui on a full-count pitch with the bases loaded to end the inning.

Adrian Gonzalez singled in Barfield in the sixth to give San Diego a two-run cushion. Mark Bellhorn added an RBI groundout in the seventh.

Notes: Mets 1B Carlos Delgado failed to homer for the only time in the series. He still went 2-for-5 with a run scored. … The Padres activated Cameron from the 15-day disabled list before the game and optioned pitcher Jon Adkins to Triple-A Portland. … Padres pitcher Chris Young will have an MRI Monday resulting from a lack of feeling in his right thumb. … Beltran did not start for the third straight game because of discomfort in his right hamstring. He is day-to-day.

AP-ES-04-23-06 1931EDT