Dodgers to add Mike Bolsinger, Joel Peralta & Ian Thomas when roster limits expand Tuesday

LOS ANGELES -- The Dodgers' initial wave of September call-ups will be a quartet of players, the team announced on Monday. a Austin Barnes accelerated his ascension back to the majors, active on Monday night against the Giants, and on Tuesday he will be joined by pitchers Mike Bolsinger, Joel Peralta and Ian Thomas.

Barnes was recalled from Triple-A Oklahoma City on Monday with Kike Hernandez placed on the 15-day disabled list with a hamstring strain.

The catcher hit .315/.389/.479 with nine home runs and 17 doubles in 81 games for Triple-A Oklahoma City, and on Monday was named to the All-Pacific Coast League team, the first Oklahoma City player to be so honored since 2010. In a few stints in the majors this season, Barnes was 4-for-15 (.267) with a double and two walks in nine games, catching seven games, including five starts.

Peralta will be activated from the disabled list on Tuesday, after pitching three scoreless innings in three appearances with Double-A Tulsa on a minor league rehab assignment. In 25 games this year for the Dodgers, the 39-year-old right-hander had a 5.40 ERA and 5.62 FIP, with 13 strikeouts and eight walks in 20 innings.

Bolsinger struck out 11 in seven scoreless innings on Saturday for Oklahoma City, and could slot in to make a spot start this weekend against the Padres, giving the starting rotation an extr day of rest, though manager Don Mattingly wouldn't reveal any details of when that start might be.

Thomas gives the bullpen a third left-handed pitcher and another option as a long reliever. Thomas, acquired from the Braves on May 27, is 1-1 with a 4.50 ERA in 10 innings over three games in the majors this season, including one start.

Two people who won't join the team on Tuesday are Corey Seager and Julio Urias, the team's top two prospects, but neither of whom are on the 40-man roster. Mattingly wouldn't commit one way or another if either might join the Dodgers later in September.

"We talked about different waves of guys coming up," Mattingly said.

Urias was promoted on Monday, but to Triple-A, and his start for Oklahoma City did not go well. The left-hander walked four and allowed three runs on two hits while striking out two in just one inning. Urias threw 44 pitches in his Triple-A debut.