Pederson hits grand slam, Frias sharp in Dodgers’ 8-0 win over Arizona

KEY MOMENT: Joc Pederson blasted a second-inning grand slam off former Dodgers prospect Rubby De La Rosa, turning a 1-0 lead into a 5-0 advantage.

AT THE PLATE: The Dodgers’ five-run second inning started with a solo home run by Justin Turner, who started at third base instead of Juan Uribe. Andre Ethier followed with a single, and Yasmani Grandal and Alex Guerrero drew walks to load the bases for Pederson. Ethier hit a home run of his own in the sixth inning, his fourth of the season. Scott Van Slyke drove in two runs with a pitch-hit single in the eighth inning.

ON THE MOUND: Carlos Frias pitched 5 1/3 scoreless innings in place of Brandon McCarthy, who underwent a season-ending elbow operation the previous day. Pedro Baez inherited two runners from Frias in the sixth inning and didn’t allow either to score. Baez pitched 1 2/3 scoreless innings. Sergio Santos pitched a scoreless eighth inning, and J.P. Howell a scoreless ninth.

EXTRA BASES: Yasiel Puig, who is on the disabled list with a strained left hamstring, could play in minor league games while the Dodgers are in Milwaukee next week. The All-Star right-fielder is eligible to be activated from the disabled list on May 10, when the Dodgers are scheduled to play the finale of a three-game series in Colorado. Manager Don Mattingly said he expected Puig to be ready to be activated around that time. “Right now, it seems like we’re on track,” Mattingly said. … Closer Kenley Jansen started his minor-league rehabilitation assignment by pitching a scoreless inning for Class-A Rancho Cucamonga. Jansen, who is recovering from a foot operation, gave up a hit and struck out one. He is expected to pitch in five or six more games in the minor leagues before he is activated. Mattingly said he is planning for Jansen to be the Dodgers’ closer again at some point, but wasn’t sure whether that would happen immediately upon his return. … In his first game at triple-A Oklahoma City, top prospect Corey Seager was two for five with a run batted in. A 21-year-old shortstop, Seager was promoted from double-A Tulsa earlier in the day.

UP NEXT: Scott Baker (0-1, 3.86 ERA) will face the Diamondbacks and Jeremy Hellickson (1-3, 5.24) at Dodger Stadium at 6 p.m. On the air: TV: SportsNet LA. Radio: 570, 1020.