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.
The recruiting class is led by four-star linebacker Demeioun Robinson.
Penn announced he would play at LSU.
Akingbesote is the fourth four-star recruit to commit to the Terps' 2021 class.
Bradley is Maryland's 11th recruit — all of whom hail from Maryland, Washington D.C. or Virginia.