According to Kirby Arnold of the Everett Herald, Corey Patterson has opted out of his contract with the Mariners and is now a free agent. Arnold writes that with Eric Byrnes looking to have won the M's backup outfield spot, Patterson decided to look elsewhere for employment.
Patterson signed a minor-league deal with Seattle last December. The 30-year-old had just 30 plate appearances last season (15 with Milwaukee, 15 with Washington) and managed only a .207 OPS, but he did hit 292/.333/.478 in 418 Triple-A plate appearances in 2009. If another club picks up Patterson, though, it will be for his glove, not his bat. Fangraphs lists Patterson as having a career UZR/150 of 8.9 in the outfield, though his defense was barely above average in 2007 and 2008, his last two years of regular playing time.