Marshall, 26, was designated recently by the Snakes. Though he showed plenty of promise in his 2014 MLB debut year, Marshall has not been nearly as effective since. Last year, he was knocked around in 15 major league appearances and managed only a 4.59 ERA in his 33 1/3 Triple-A frames.
As for Smyly, the move likely doesn’t impact his timeline. A flexor strain was already slated to cost him six to eight weeks, and any length of rehab assignment would have extended that figure. While awaiting his return, the M’s will put his 40-man spot to use to ensure there’s adequate pitching depth on hand.