Bolsinger, Thomas among Dodgers' additions

Barnes, Peralta also slated for expanded September rosters

Bolsinger, Thomas among Dodgers' additions

LOS ANGELES -- The first wave of Dodgers callups arrived Monday, as lockers appeared for pitchers Mike Bolsinger and Ian Thomas, along with catcher Austin Barnes.

Also showing up Monday was reliever Joel Peralta, who is on the disabled list with a bulging disk in his neck and has made three Minor League rehab appearances. The four are expected to be activated when rosters expand Tuesday.

But manager Don Mattingly said top prospects Corey Seager and Julio Urias will not be promoted this week. He wouldn't say when, or if, they would.

"We talked about different waves of guys coming up and we'll get to that," Mattingly said. "Anybody that comes up has a chance to catch fire. Most of the time with a club if you're winning, you're not going away from the guys that got you to this point, but those guys can be useful to keep guys rested. And there's instances where guys get hot and he becomes the guy; we've seen it with K-Rod a few years back. They give you a boost."

Bolsinger's promotion is interesting in that he was successful as a starting pitcher for the Dodgers until the non-waiver Trade Deadline acquisitions of Alex Wood and Mat Latos.

Bolsinger threw seven scoreless innings Saturday, so he likely wouldn't be able to pitch until Thursday, when Latos is scheduled to start in San Diego. Saturday was also the same day Latos made a 4 2/3-innings start for the Dodgers, leading to speculation that Bolsinger could soon replace Latos in the big league rotation. Mattingly has also said the Dodgers could use a six-man rotation for a turn or two to give his starters extra rest, but he wouldn't divulge specifics on the plan moving forward.

"We'll let you know," Mattingly said. "Not [willing to say] at this point."

Thomas gives the Dodgers a left-handed swingman who can pitch multiple innings, while Barnes becomes a third catcher. He also has the versatility to play in the infield, although in Spring Training the club told him to focus solely on catching.

Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.