The D-backs' team batting average is .225, the lowest in the major leagues by nine percentage points. Tracy was a triple short of the cycle in a 10-0 victory over the Chicago Cubs on April 29 but is 1-for- 17 since. He was hitting .306 on April 20 this season but is 6-for-40 with three RBI since.

"We've got to find a way to do things a little bit differently. We'll see him in the lineup quite a bit," Melvin said of Whitesell before Wednesday's game. "(Tracy) is going to pinch hit, (and) he's going to fill in at third and first for a while. We'll see how Josh does."

Whitesell, 27, was hitting .356 with three homers and 20 RBI at Reno and was the D-backs' organizational player of the year in 2008, when he hit .228 with 36 doubles, 26 home runs and 110 RBI at Class AAA Tucson. His RBI total was a Tucson franchise record.

Whitesell was acquired from Washington during spring training of 2008, when it became apparent that Tracy's surgically repaired right knee would take longer to heal that originally hoped. Tracy has played only 164 games the last two seasons because of knee injuries and had micro-fracture surgery on his right knee in September 2007, delaying him last spring. He hit .267 with eight homers and 39 RBI in 88 games last season.

DIAMONDBACKS 3, PADRES 1: OF Justin Upton had two home runs, drove in all the D-backs' runs and threw out a runner at the plate while extending his career-best hitting streak to 13 games. Upton's two-run homer off RHP Jake Peavy broke a scoreless tie in the sixth. Upton threw out C Henry Blanco attempting to tag and score on a fly to right to end the fifth. RHP Jon Garland gave up three hits in seven scoreless innings, striking out two and benefiting from three of the D-backs' four double plays as the team broke a three-game losing streak.