solo tackles during their 34–6 loss. He pushed Greg Jennings out of bounds after an 11-yard reception in the first quarter for his first career regular season tackle. On October 26, 2014, Joyner recorded a season-high ten combined tackles (nine solo) during a 34–7 loss at the Kansas City Chiefs in Week 8. On November 9, 2014, Joyner exited in the first quarter of the Rams' 31–14 loss at the Arizona Cardinals after sustaining a groin injury. His groin injury sidelined him for the next three games (Weeks 11–13) and he was replaced by cornerback E. J. Gaines during his absence. Joyner missed another two games (Weeks 14–15) as a healthy scratch after defensive coordinator Gregg Williams opted to retain Gaines at nickelback. In Week 17, Joyner earned his first career start, recorded four combined tackles, and made his first career sack on quarterback Russell Wilson in the Rams' 20–6 loss at the Seattle Seahawks. He finished his rookie season with 40 combined tackles (35 solo), two pass deflections, and a sack in ten games and one start. 2015 He entered camp competing for the job as the first-team nickelback against E.J. Gaines. Joyner became the de facto nickelback after Gaines sustained a lisfranc injury that was expected to sideline him for the entire season. He appeared in the St. Louis Rams' season-opener against the Seattle Seahawks and recorded a season-high seven solo tackles and a sack on Russell Wilson in their 34–31 loss. On November 9, 2015, Joyner was involved in a controversial play after delivering a late hit on quarterback Teddy Bridgewater in the fourth quarter of the 21–18 overtime loss to the Minnesota Vikings. During the play, Bridgewater was performing a baseball slide after running for a five-yard gain and was hit by Joyner and immediately knocked unconscious. The Rams were received a 15-yard penalty for unnecessary roughness and Joyner would subsequently be fined $23,152 by the NFL. On December 6, 2015, Joyner tied his season-high of seven combined tackles and two pass deflections during a 27–3 loss against the Arizona Cardinals. He finished the season with 72 combined tackles (54 solo), six pass deflections, and two sacks in 16 games and six starts. 2016 During the offseason, the St. Louis Rams officially relocated to Los Angeles, California. Throughout training camp, Joyner competed for the job as a starting cornerback against E.J. Gaines, Coty Sensabaugh, and Marcus