Throughout his four-year career, Jay Ajayi has only had one season of stability. He's endured being the backup running back, being traded midseason, and had a season-ending knee injury. In Ajayi's lone season of stability, he was selected to the Pro Bowl.

In 2015, Ajayi's second season, he took over as the starting running back for the Miami Dolphins. In that season, Ajayi ran the ball 260 times for 1,272 yards and eight touchdowns. He also showed some versatility outside of the run game, as he caught 27 passes for 151 yards.

In Ajayi's three other seasons, he was never able to establish himself. In Ajayi's rookie season, he was the backup to Lamar Miller and was only able to get 49 total carries. In 2016, Ajayi was traded midseason to the eventual Super Bowl champions, the Philadelphia Eagles. While with the Eagles, Ajayi split time with Lagarette Blount, Corey Clement and Wendell Smallwood. This past season, still with the Eagles, Ajayi tore his ACL in just the fourth game of the year.