He is the son of College Football Hall of Fame cornerback Johnnie Johnson and attended high school at Valley Christian in San Jose.
[1] Early in his junior season, Johnson hauled in a career-high 191 yards against USC, including 47 on a go-ahead touchdown.
[5] Heading into his senior year, coach Tom Herman noted that Johnson improved markedly in the offseason.
[13] The Jaguars received the 165th pick used to select Johnson as a result from a trade that sent Dante Fowler to the Los Angeles Rams.
[14] In Week 5 against the Houston Texans, Johnson recorded three catches for 30 yards and his first career touchdown reception during the 30–14 loss.
Jaguars quarterback Mike Glennon threw a 46-yard pass that Johnson ran in for his second touchdown of the year.
Collin's older brother Kirk was also a football player at Texas (2015–19), and his sister Camille was a member of the track and field team where she threw the javelin (2018–19).