The Astros acquired Enerio Del Rosario from the Reds for cash, according to a team press release. Houston designated Oswaldo Navarro for assignment to make room for Del Rosario on the 40-man roster. The Reds designated Del Rosario for assignment earlier in the week to make room for new acquisition Willie Bloomquist.
Del Rosario, a 24-year-old right-hander, pitched 8.2 innings for the Reds in May and June, striking out three, but allowing about two baserunners per inning. He posted a 3.09 ERA in 64 innings at Triple A this year with 4.8 K/9 and 2.4 BB/9 and was a Florida State League All-Star in 2009.
Navarro, a 25-year-old shortstop, collected just one hit and five walks in 25 trips to the plate for the Astros earlier in the year. He hit better in 81 games at Triple A Round Rock, posting a .785 OPS with 24 doubles.