Selected by the Raiders in the fourth round (129th overall) of the 2019 NFL Draft, April 27, 2019. Johnson was a three-star receiver recruit when he enrolled at UH, coming off a successful high school football and track career. He spent his redshirt season and two more years at receiver (6-43-7.2 in 11 games in 2015; 15-165-11.0, one start in 11 games in 2016) before making the switch to cornerback. Johnson started 5 of 12 games there in 2017, intercepting two passes and breaking up seven others. He had an impact outside again as a senior, starting 10 of 11 games played, compiling 66, two for loss, intercepting two passes, and leading the Cougars with seven pass breakups.