PHOENIX (CBS / AP) — Madison Bumgarner pitched seven strong innings and the San Francisco Giants opened defense of their third World Series title in five years with a 5-4 win over the Arizona Diamondbacks on Monday night.

Bumgarner (1-0) was the NLCS and World Series MVP last season and was sharp to start the 2015 season, allowing a run on six hits.

READ MORE: San Leandro Community Rallies for Reform on Anniversary of Steven Taylor's Police Shooting Death

The Giants lost power-hitting Pablo Sandoval during the offseason and were without injured right fielder Hunter Pence, but made up for it by stringing together 10 hits in four-plus innings against Josh Collmenter (0-2).

READ MORE: Lodi Parachute Center Skydiver Dies After Chute Gets Tangled on Descent

Angel Pagan had a pair of run-scoring singles and Brandon Crawford hit a two-run double for the Giants.

Diamondbacks pinch-hitter Jake Lamb hit a three-run double off Sergio Romo in the eighth, but Jeremy Affeldt stranded two runners to end the inning. Santiago Casilla worked a perfect ninth for the save.

MORE NEWS: Saratoga Resident Displaced in 2-Alarm House Fire Sunday Morning

© Copyright 2015 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.