The Milwaukee Brewers placed left-hander Kyle Harrison on the 15-day injured list Saturday with forearm tightness.

The move is retroactive to Thursday, one day after Harrison pitched four innings and took the loss in the Brewers' 5-1 setback to the St. Louis Cardinals.

Harrison, 24, is 8-2 with a 3.01 ERA in 17 starts this season, his first with Milwaukee. He was acquired from the Boston Red Sox in February.

Also on Saturday, the Brewers recalled left-hander Robert Gasser, 27, from Triple-A Nashville. He is 2-3 with a 4.15 ERA in eight starts with Milwaukee this season.