PHOENIX – Chad Tracy singled home Andy Green in the 10th inning to give the Arizona Diamondbacks a 4-3 victory over San Diego on Sunday, reducing the Padres’ lead in the sorry NL West to four games over San Francisco.

Akinori Otsuka (2-8) took the loss for the second day in a row. He gave up an infield single to pinch-hitter Green to lead off the 10th, then threw the ball away on Craig Counsell’s sacrifice bunt, leaving runners at second and third with no outs.

Luis Gonzalez was walked intentionally before Tracy’s liner into right field ended the game. Tracy also had a three-run double in Saturday night’s 8-5 come-from-behind victory.

Arizona outhit the Padres 13-2. San Diego didn’t have a hit after Joe Randa’s three-run homer with one out in the fourth.

The Padres lost their last two in Arizona to drop one game below .500 (77-78). With San Francisco’s 6-2 victory at Colorado, San Diego leads the second-place Giants by four games with seven to play.

The Padres and Giants begin a four-game series in San Diego on Monday night. Arizona, 51/2 back with six games left, averted elimination by winning its final home game of the season.

Washington (78-78), the last-place team in the NL East, has a better record than the division-leading Padres.

Closer Jose Valverde (3-4) pitched a perfect 10th for the victory.

Randa’s homer, one of two hits allowed by Arizona’s Javier Vazquez in seven innings, put San Diego up 3-2. The 337-foot fly ball barely made it into the Diamondbacks’ bullpen just inside the left-field foul pole.

Arizona tied it at 3 in the seventh when Tony Clark walked, Alex Cintron singled and Royce Clayton walked to load the bases with one out. Luis Terrero, running for Clark, scored on pinch-hitter Quentin McCracken’s groundout. Scott Linebrink struck out pinch-hitter Troy Glaus to end the inning.

Vazquez struck out a season-high 12 and retired 11 in a row after Randa’s homer. The only other Padres hit was Brian Giles’ two-out double in the first.

In the fourth, Vazquez fanned Giles for what would have been the second out, but the ball got past the catcher for a wild pitch and Giles reached first. Ryan Klesko drew Vazquez’s lone walk of the afternoon, then Randa lofted his 17th home run of the season on a 1-1 pitch to make it 3-2.

Woody Williams gave up two runs and nine hits in 5 1-3 innings for the Padres.

The Diamondbacks scored single runs in the second and third to go up 2-0 on RBI singles by Vazquez and Alex Cintron.

Notes: Vazquez may have been making his last home start for Arizona. He has a contract clause that allows him to demand a trade in the offseason. … Padres OF Dave Roberts, who strained his left quadriceps on Saturday night, says he thinks he will be able to play at some point in the Giants’ series. … 1B Robert Fick got a rare assignment as leadoff batter for San Diego. He was 0-for-4. … The Diamondbacks finished 36-45 at home, the Padres 36-45 on the road.

AP-ES-09-25-05 2003EDT