Cody Bellinger started for Van Slyke against the Padres.
• In other medical updates, Andre Ethier was still on crutches after fouling a pitch off his right shin on Friday, but Roberts said Ethier was moving better and still is expected to be ready on Opening Day.
Roberts hasn't backed off that Opening Day timeline for shortstop Corey Seager, who has added hitting to his workload as he recovers from a sprained left knee.
• Hyun-Jin Ryu is scheduled for his next bullpen session on Tuesday, Roberts said.
• Non-roster catcher Shawn Zarraga will miss two days with a bruised left thumb.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.