Seeing how Boston Celtics forward Jaylen Brown has become a budding superstar in the NBA today, it shouldn’t need much convincing to believe that he used to be a monster back in his high school days at Joseph Wheeler in Marietta, Georgia.

But if anyone needs some form of visual evidence, then here’s Brown posting some of his defensive highlights with the Wildcats. The clip features a montage of Brown’s scary athleticism, excellent timing, and utter lack of mercy for his opponents.

College basketball scouts drooled over Brown’s basketball potential, which was also why he got ranked by as the No. 4 overall prospect on ESPN's 100 list in 2015, just behind the likes of Ben Simmons, Skal Labissiere, and Brandon Ingram. Brown received offers from top-flight programs like the Kansas Jayhawks, Kentucky Wildcats, UCLA Bruins, North Carolina Tar Heels, Michigan Wolverines, and Georgia Bulldogs but decided to sign with the California Golden Bears instead.

Brown’s defense in the pros, however, is more than just being predicated on swatting away shots. He is also rapidly becoming one of the best lockdown perimeter defenders in the NBA, which plays right into the Celtics’ philosophy. Just last season, opponents shot 5.5 percent worse on attempts taken from 15 feet or farther when Brown was on the floor.

Entering his third year in the NBA, expect Jaylen Brown to get even better and more menacing for opposing scorers.