Blackley, 30, is scheduled to make his Texas debut with a start tonight against his former club. He was acquired from Houston in exchange for cash considerations on Wednesday, August 14, and made one start for Round Rock on Thursday vs. Tacoma (ND, 3.0 IP, 1 H, 0 R, 2 BB, 2 SO, 40 pitches/22 strikes).
Prior to Wednesday's trade, Blackley spent the entire season in the Houston organization after being designated for assignment by Oakland at the end of spring training. He was acquired by Houston in a trade with the A's on April 4 and has gone 1-1 with a 4.89 ERA (19 ER/35.0 IP) in 42 relief appearances for the Astros this season, allowing 10 home runs and 20 walks against 29 strikeouts. The Australia native is 8-8 with a 5.28 ERA (104 ER/177.1 IP) over 78 games/23 starts in his major league career with Seattle (2004), San Francisco (2007, 2012), Oakland (2012), and Houston (2013). Of Blackley's 8 career wins, 2 have come at Rangers Ballpark and 4 have been against Texas.
West, 24, has not pitched this season as he continues to recover from Tommy John ligament replacement surgery on August 22, 2012. A converted outfielder, he was originally selected by Texas in the second round of the 2007 June draft.
With these moves, the Rangers still have a full 40-man roster.