Manager Dave Roberts said Seager was receiving treatment and was considered day to day. Roberts said he was not concerned about Seager's availability for Game 1 of the National League Championship Series presented by Camping World on Saturday vs. the Cubs.
Enrique Hernandez, Chris Taylor and Charlie Culberson were taking ground balls at shortstop during infield practice.
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"We just felt it was better to keep him inside and getting treatment, and he can also rest his elbow," Roberts said, referring to the right elbow injury that has plagued Seager since late August and could require offseason surgery.
There was no indication on the severity of Barnes' injury, which occurred when he was catching Alex Wood's simulated game. He doubled over in pain and headed to the trainer's room. It's the second time in less than two weeks that Barnes has taken a foul to the groin; it also happened in the second-to-last game of the regular season in Colorado.
Barnes' emergence as a prominent player was underscored in the NL Division Series presented by T-Mobile, when he went 4-for-8 with a homer and three RBIs.
Also not participating in the workout was catcher Yasmani Grandal, who flew home to Arizona to be with his pregnant wife. Roberts said Grandal was expected to return to Los Angeles in time for Friday's workout. Grandal went 0-for-4 with two strikeouts in the NLDS.
The Dodgers carried third catcher Kyle Farmer in the NLDS.
Ken Gurnick has covered the Dodgers since 1989, and for MLB.com since 2001. This story was not subject to the approval of Major League Baseball or its clubs.