The Orioles activated Kremer (quadriceps) from the 60-day injured list Wednesday.
Kremer will start Wednesday's game against the White Sox after missing more than two months of action due to a right quad strain. The right-hander spun 6.2 scoreless innings and threw 79 pitches in his final rehab outing with Triple-A Norfolk, so his workload Wednesday will likely be slightly limited from a pitch-count perspective. Kremer logged a 4.09 ERA and 16:2 K:BB over 11 innings back in April before getting injured.