Farquhar was traded to the Rays on Thursday as part of a six-player deal, Bob Dutton of the Tacoma News Tribune reports.
Farquhar made 43 appearances with the Mariners in 2015, striking out 48 batters while walking 17 across 51.0 innings. Even in pitcher-friendly Safeco Field, Farquhar gave up six of his nine home runs at home. He'll likely compete for a spot in the Rays bullpen out of spring training.