11:44am: The Athletics have acquired Guillermo Moscoso from the Rangers, reports Kevin Goldstein of Baseball Prospectus (on Twitter). Oscar Prieto Rojas first reported the deal (on Twitter). Evan Grant of The Dallas Morning News tweets that Texas will receive minor league right-hander Ryan Kelly.
The 27-year-old Moscoso was designated for assignment just yesterday. He spent the majority of 2010 pitching for Texas' Triple-A affiliate, posting a 5.18 ERA with 7.8 K/9 and 3.6 BB/9 in 123 1/3 innings. He has a 3.46 ERA with 8.7 K/9 and 2.4 BB/9 in parts of six minor league seasons, and his brief major league career features a 4.30 ERA with 8.6 K/9 and 4.9 BB/9 in 11 appearances. The Rangers originally acquired Moscoso from the Tigers in exchange for Gerald Laird.
Oakland acquired Kelly from the Pirates in exchange for Corey Wimberly just last month. The 23-year-old had a 4.20 ERA with 9.0 K/9 and 1.7 BB/9 in 75 innings for Pittsburgh's Single-A affiliate in 2010, almost all in relief.