Nationals designated RHP Kyle Nicolas for assignment.

The move opens up a spot on the 40-man for Reiver Sanmartín. Nicolas, 27, was acquired from the Orioles in July, but he never pitched in the majors for the Nationals. He has a 4.96 ERA and a 103/66 K/BB in 105 1/3 innings as a major leaguer, most of which came with the Pirates.