Colorado Rockies' right-hander Bill Swift, who aggravated a strained pectoral muscle, was put on the 15-day disabled list Wednesday.
The move is retroactive to Tuesday, but the Rockies have not recalled anyone from triple-A Colorado Springs to replace Swift on the 25-man roster.
Swift (4-1), who has a 4.75 earned-run average in seven starts, began last season on the DL after shoulder surgery. Shoulder problems also led to two stints on the disabled list in 1994 and 1995.
Swift initially strained his right pectoral muscle making a throw to first base against Montreal on April 14. He aggravated the injury Monday while making an off-balance throw to second in Philadelphia.
