Young powers Diamondbacks past Padres

Chris Young hit a two-run homer in the 11th inning and the Arizona Diamondbacks remained undefeated with a 4-2 victory over the San Diego Padres on Tuesday night.

After Micah Owings (0-1) hit leadoff batter Gerardo Parra, Young sent the next pitch into the lower deck of the left-field stands for his second homer.

Craig Breslow (1-0) pitched a perfect 10th inning to earn the victory against his former team, lifting Arizona its first 4-0 start. The Diamondbacks are the only unbeaten team in the National League.

Yonder Alonso hit a leadoff single in the 11th for San Diego, but J.J. Putz retired the next three batters for his third save in three chances.

The Diamondbacks held a 2-1 lead before Orlando Hudson tripled and scored on Jason Bartlett's single in the seventh. San Diego advanced a runner to third in the ninth, but David Hernandez struck out Cameron Maybin to end the threat.

Trevor Cahill pitched six strong innings in his debut for Arizona, despite issuing six walks to his hometown team. Cahill, who was acquired from Oakland in a five-player trade in December, grew up about 40 miles north of San Diego and was facing the Padres for the first time in his career.

He struck out five and threw more balls (54) than strikes (50).

Paul Goldschmidt's two-run double was one of three hits in the first against Edinson Volquez, who allowed only two more hits over the next six innings.

Volquez struck out eight, including a stretch of four batters in a row, and issued three walks.

NOTES: Arizona OF Justin Upton was scratched from the starting lineup with an injured thumb. Upton hurt himself sliding into second base on Sunday, but X-rays were negative. Upton entered the game in the 11th to play right field. ... San Diego's Mark Kotsay, who began the season the disabled list with a calf injury, will start a rehab assignment on Wednesday with Class A Lake Elsinore. ... Joe Saunders will make his season debut for Arizona on Tuesday against San Diego's Cory Luebke.