Brett Sullivan spent a little more than three years in the San Diego Padres organization before he was traded to the Pittsburgh Pirates in April. The Pirates designated Sullivan for assignment on Wednesday, a corresponding roster move for the return of pitcher Dauri Moreta from the injured list and the promotion of Joey Bart to the majors. Sullivan, 31, saw action in three big league games with the Pirates, going 1 for 6 with a single, two RBIs, a walk, and three strikeouts.