Bradley-King, a two-time All-Sun Belt Conference selection with the Red Wolves, has one year of eligibility remaining and will be able to play in the upcoming season.
The 6-foot-4, 248-pound Bradley-King had 82 tackles, 23 tackles for loss, 14.5 sacks, five forced fumbles and three fumble recoveries in his final two seasons at Arkansas State.
Bradley-King, a Kansas City native, could play linebacker or defensive end for the Bears.
Aranda, a former LSU defensive coordinator, inherits a defense that returns only two starters from a unit that helped lead Baylor to an 11-3 record and a spot in the Big 12 championship game in 2019. The Bears must replace all three starting defensive linemen, including All-American James Lynch, along with two starting linebackers.