Stills attended La Costa Canyon High School in Carlsbad, California, where he was a three-sport star in football, basketball, and track.

[5] After the 2012 season, Stills decided to forgo his final year of college eligibility and enter the NFL Draft.

[9] Throughout training camp, Stills competed against Joe Morgan, Nick Toon, and Andy Tanner to be the third wide receiver on the Saints’ depth chart.

[10] Head coach Sean Payton named Stills the fourth wide receiver on the depth chart to begin the regular season, behind Marques Colston, Lance Moore, and Nick Toon.

[11][12] Stills made his NFL debut in the season-opener against the Atlanta Falcons and caught two passes for 86 yards in a 23–17 victory.

[13] In Week 2, Stills earned his first NFL start and caught a ten-yard pass during a 16–14 win at the Tampa Bay Buccaneers.

[14] During Week 6, Stills made three catches for 64 yards and caught his first NFL touchdown during the Saints’ 30–27 loss at the New England Patriots.

[15] On October 27, 2013, Stills made three receptions for a season-high 129 receiving yards and caught two touchdown passes as the Saints defeated the Buffalo Bills 35–17 in Week 8.

[19] On March 13, 2015, Stills was traded to the Miami Dolphins in exchange for linebacker Dannell Ellerbe and a third round pick in the 2015 NFL draft.

[22] On September 11, 2016, Kenny Stills began kneeling during the national anthem to protest police brutality along with teammates Jelani Jenkins, Arian Foster, and Michael Thomas.

[34] In the Divisional Round of the playoffs against the Kansas City Chiefs, Stills caught three passes for 80 yards, including a 54-yard touchdown, during the 51–31 road loss.

[40] He was elevated to the active roster on January 23 for the AFC Championship against the Kansas City Chiefs, and reverted to the practice squad after the game.

After law enforcement warned that staying on Cameron's property was unlawful, he, along with the rest of the group, was charged with intimidating a participant in a legal process, disorderly conduct and criminal trespass.