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The Phillies signed Cook to a minor league contract that included an invitation to major league spring training in January. He appeared in six games -- including three starts -- for Philadelphia this spring, maintaining an ERA of 3.38 with four walks and five strikeouts over 18 2/3 innings prior to his release.
If Cook had accepted a minor league assignment with the team, he would have earned a $100k retention bonus. Murphy notes that it's not clear if Cook requested his release or if the Phils wanted to avoid the payout.
While Cook didn't have an obvious spot on Philadelphia's roster, his departure does leave the team without a veteran starter in Triple-A. Murphy believes the move could indicate that promising left-hander Adam Morgan could start the season in Triple-A along with right-handers Jonathan Pettibone and Ethan Martin.
Cook spent the 2012 season with the Boston Red Sox. He started 18 games for Boston, posting a 5.65 ERA over 94 innings. The 34-year-old owns a career ERA of 4.60 with a strikeout-to-walk ratio of 1.35 over 11 seasons in the majors.