Ruffin was a 2010 first-round pick by the Tigers but never met expectations. He came to Seattle as part of the ill-fated Doug Fister trade in 2011 with Charlie Furbush, Casper Wells and Fernando Martinez. Only Furbush remains with the Mariners. The Mariners considered converting him to a starter but removed him from the 40-man roster last offseason. In 22 appearances, seven starts, at Triple-A this season, Ruffin had a 5.31 ERA. He made 24 career major-league appearances, all in relief, posting a 5.60 ERA.