Caleb Baragar (3-1) got the final two outs of the sixth and earned the win.

Weaver was strong early for the Diamondbacks, facing the minimum through four innings. He gave up two runs over 5 2/3 innings with five strikeouts.

The Diamondbacks have lost five in a row.

The Giants acquired infielder Daniel Robertson from Tampa Bay on Sunday morning in exchange for cash or a player to be named later. Robertson, 26, hit .231 with 16 homers and 72 RBI over parts of three seasons with the Rays. He was designated for assignment last week.

Robertson was a first-round draft pick by Oakland in 2012, at a time when current Giants President of Baseball Operations Farhan Zaidi was part of the A’s front office.

Diamondbacks: LHP Madison Bumgarner, who didn’t make the trip to San Francisco to face his old team because of a mid-back strain, was scheduled to throw a simulated game at Chase Field on Sunday with the plan of getting him up to 70 pitches.

Giants: RHP Sam Coonrod was reinstated from the 10-day injured list before the game. The reliever missed 21 games with a right lat strain. He posted a 7.36 ERA in four appearances before his injury.