Olmos, 25, was 1-1, 3.55 with 1 save in 20 games, 2 starts, with the Rainiers this season. In 33.0 innings pitched, he struck out 34 while walking 13. In his last 10 games (July 10-current), he was 0-1 with a 1.86 ERA (19.1 IP, 4 ER). In his last outing, a start on August 11, Olmos tossed 5.0 hitless innings vs. Sacramento, throwing 75 pitches (44 strikes).
Olmos was on the disabled list from April 3-May 20 with a left shoulder impingement. The injury caused him to miss all of spring training, as well. Olmos was acquired by Seattle from the Miami Marlins via a waiver claim on Nov. 20, 2014.
Olmos made his Major League debut with the Marlins on June 3, 2013 at Philadelphia, allowing only 1 hit in 1.1 scoreless innings in relief. Over 5 appearances with Miami that season, he went 0-1 with a 7.20 ERA (4 ER, 5.0 IP). He was originally selected by the Marlins in the 3rd round of the 2008 MLB First-Year Player Draft out of Birmingham High School in Los Angeles, California.
Rasmussen, 26, is 2-1, 16.20 in 8 games with the Mariners (6.2 IP, 12 ER). Rob was the winning pitcher in yesterday's 10-8, 12-inning win at Boston, working a shutout inning. He appeared in all 3 games in the Red Sox series, working a total of 3.0 innings. In 9 MLB games this season, Rob has 5 shutout appearances (2-0, 0.00 in 5.2 IP) but has allowed 12 ER in 2.0 IP (0-1, 54.00) in the other 4 games. Rasmussen was acquired by Seattle from Toronto (along with RHP Jose Ramirez) in exchange for RHP Mark Lowe on July 31, 2015.