Astros designated RHP Enerio Del Rosario for assignment. The move was made to open a spot on the 40-man roster for Che-Hsuan Lin who was claimed off waivers from the Red Sox. The 26-year-old Del Rosario posted a 9.00 ERA, 2.16 WHIP and 11/7 K/BB ratio in 19 innings at the major league level for the Astros last season.