The Seahawks elevated Sullivan from the practice squad Saturday, Gregg Bell of The Tacoma News Tribune reports.
Sullivan played wide receiver in college, but the Seahawks drafted him in the seventh round with the hopes of converting him to tight end. That didn't pan out, and he's been taking reps at defensive end on the practice squad. The Seahawks already have five other healthy tight ends on the active roster, so Sullivan could see a bulk of his usage on defense if he indeed gets in the game.