Despite strong late-season performances from José Valverde, who returned to the closer role in early September as a much improved relief pitcher, finishing the season with 18 saves, as well as other called-up Baby Backs including CF Chris Young and infielder Alberto Callaspo, the Diamondbacks lost 18 games in the month of August, including being swept in three games at San Francisco. They were at that point, for all intents and purposes, knocked out of the NL West pennant race and the NL Wild Card race. On September 24, the Diamondbacks were mathematically eliminated from postseason contention with a 5-1 loss at Los Angeles. The final game of the 2006 season was a 7-6 loss to the San Diego Padres at Chase Field (which gave the Padres the 2006 NL West Division championship) and featured a rare poor performance by ace starting pitcher Brandon Webb. The Diamondbacks finished the year with 76 wins and 86 losses for a .469 winning percentage. They tied for 4th place in the NL West with the Colorado Rockies, 12 games behind the Padres.