Futures deals are essentially camp invites that will give players the opportunity to compete for roster spots during offseason workouts and training camp.
Wilborn, 23, wound up going undrafted out of Ball State last April. He later signed a rookie contract with the Falcons, but was waived coming out of training camp.
The Steelers signed Wilborn to their practice squad only to release him a month later.
During his college career at Ball State, Wilborn recorded 166 tackles, three sacks, two forced fumbles, four interceptions and eight passes defended over the course of two seasons and 24 games.