CHICAGO -- The Baltimore Orioles will have to get by without another starting pitcher after placing Dean Kremer on the 15-day injured list Friday because of a strained right triceps.

It's another hit for Baltimore after veteran John Means was placed on the 15-day IL the previous day because of a strained left forearm.

Kremer is 3-4 with a 4.32 ERA in nine starts. The right-hander got tagged for five runs in four innings, matching his shortest outing this season, in Monday's loss at St. Louis.

Manager Brandon Hyde said Kremer mentioned after the fourth that his arm was bothering him and the pain "is still kinda lingering."

"We want to use some caution and put him on the IL, and hoping it's not gonna be very long," he said.

Hyde said the Orioles were still discussing who will start Saturday in Kremer's place.

Baltimore recalled right-hander Dillon Tate and and left-hander Nick Vespi from Triple-A Norfolk and optioned righty Jonathan Heasley to the minor league club on Friday.