Before that injury, Brown was playing at a pretty high level.
In 2021 he was third in solo tackles as he started every game. He was tied for 2nd in INT's with three, 17 passes defensed and a forced fumble. He participated in 97% of the defensive snaps.
In the 2021 playoff game against the 49ers, Brown played in every defensive snap. He had an INT in the 4th quarter that put the offense on the 49ers 28 yard line and led to a TD that put the game back in reach with the Cowboy trailing by only 6 points. Had the Cowboys won that game, he would have been one of the main heroes. It's no wonder the 49ers were interested in him.
What more could you ask of a former 6th round pick?