SAN DIEGO (AP) — Eric Stults had a promising first three innings for the San Diego Padres on Thursday night, allowing only one baserunner.
Then he allowed his first hit, a bunt single by Junior Lake, followed by Anthony Rizzo's go-ahead, two-run home run on a 3-1 fastball that helped power the Chicago Cubs to a 5-1 victory.
"Obviously a good start, a poor finish," Stults said. "I felt like early in the game, everything was working.
"Even the fourth inning, I'm fine with giving up that home run. I don't want to give it up, but I felt like 3-1 I challenged him and he put a good swing on it."
Jake Arrieta pitched six strong innings for the Cubs.
Arrieta (1-0) held San Diego to one run and four hits, struck out seven and walked one. He was activated May 3 after beginning the season on the disabled list with tightness in his right shoulder and came in with a 2.70 ERA in three starts.
San Diego lost its fourth straight game. It was the 15th time in 48 games the Padres scored one or no runs.
The Padres were shut out for the eighth time — most in the majors — on Wednesday night, losing 2-0 to Minnesota.
Rizzo put the Cubs ahead 2-1 in the fourth with a 417-foot homer into the sandy play area beyond the fence in right-center, his eighth.
Rizzo was with the Padres part of the 2011 season before being traded to the Cubs in the deal that sent right-hander Andrew Cashner to San Diego.
The Cubs chased Stults in the fifth with three runs and four hits. Nate Schierholtz hit a leadoff double and scored on Darwin Barney's single to center. Arrieta sacrificed Barney, who scored on Emilio Bonifacio's single to right. Lake doubled over center fielder Cameron Maybin's head to bring in Bonifacio.