Kris Bryant hit a go-ahead, two-run homer in the eighth inning to give the Cubs a 12-11 comeback victory over the San Francisco Giants in a wild, back-and-forth game Wednesday night at Wrigley Field.

Nicholas Castellanos and Kyle Schwarber also connected for Chicago, which has won four straight. The Cubs moved back into first place in the NL Central by a half-game over St. Louis, which lost to Milwaukee in a rain-shortened game.

Evan Longoria, Mike Yastrzemski, Stephen Vogt and Kevin Pillar homered for San Francisco, which has dropped three in a row.

Castellanos led off the eighth with an infield single to set the stage for Bryant, who stroked a 1-1 pitch from Reyes Moronta (3-7) into the left field bleachers.

Brandon Kintzler (3-2) pitched a scoreless inning and Craig Kimbrel worked a 1-2-3 ninth for his 11th save.

Chicago led 6-2 heading into the fifth on Wednesday. This time, Yu Darvish coughed up the lead himself.

After retiring 12 straight batters, he gave up a double to Brandon Crawford with one out in the fifth. One out later, Yastrzemski homered to make it 6-4.

Darvish allowed seven runs (six earned) and seven hits in 5 1/3 innings. He had eight strikeouts and walked none for a career-high fifth straight start.

Jeff Samardzija (9-9, 3.54 ERA) faces his former team in the finale of the three-game series Thursday afternoon. Samardzija is 0-2 with a 6.35 ERA in three starts against Chicago. RHP Kyle Hendricks (8-9, 3.37) pitches for the Cubs.