The Terps' coach cut his teeth as a coordinator with the Fighting Illini in the 2000s.
Going into his third season as head coach, Locksley wants to see his team move forward as his program grows.
Campbell led the Terps with 10.5 sacks per game in 2020.
Penn announced he would play at LSU.
Among other signings, coach Mike Locksley secured five-star wideout Rakim Jarrett.
Battle becomes the Terps' second decommit in the 2020 recruiting class.
Battle's commit comes just one day after the Terps landed offensive tackle Santana Saunders.