The 2018 season was the Jacksonville Jaguars' 24th in the National Football League (NFL) and their second under head coach Doug Marrone.

After they lost to the Tennessee Titans in Week 14, the Jaguars fell to 4–9 and were officially eliminated from postseason contention.

[1] While not as widely covered as the turmoils of the Pittsburgh Steelers during the same season, the 2018 Jaguars experienced several off-the-field incidents as well as conflict among team members.

[2] Cornerback Jalen Ramsey was criticized for calling over a dozen quarterbacks, most notably the Buffalo Bills’ Josh Allen “trash” before the season started in August 2018.

[3][4] Before the team’s Week 8 matchup against the defending Super Bowl champion Philadelphia Eagles in London, several Jaguars players (Ronnie Harrison, D. J. Hayden, and Jarrod Wilson) were arrested after walking out on a $64,000 bar tab at the London Reign Showclub.

The NFL suspended Fournette one game for violating the league's unsportsmanlike conduct and unnecessary roughness rules.

Running backs (RB) Wide receivers (WR) Tight ends (TE) Defensive linemen (DL) Defensive backs (DB) Special teams Reserve The Jaguars' preseason opponents and schedule were announced on April 11.