War on I-4

The War on I-4 is a college rivalry between the University of Central Florida Knights and University of South Florida Bulls. The rivalry is best known for its college football matchup which originated in a series of football games played from 2005 to 2008 and now takes place on Thanksgiving weekend, the de facto "rivalry weekend" for FBS football. From 2013 to 2023, when both schools were part of the American Athletic Conference, the schools began competing annually in all sports both schools sponsored (with the 1993–94 season being the only other season the schools competed in every sport both schools sponsored). In 2016, the schools officially adopted the "War on I-4" as an official competition series. Each year, the team with the most wins across all sports receives a gold trophy styled after an Interstate 4 (I-4) road sign with the logos of each school. The winner of the annual football game also receives a similar trophy.

As of March 19, 2024, South Florida holds the all-time series lead for seven of the ten sports in which the schools meet head-to-head: baseball (86–85), men's basketball (28–19), women's basketball (32–17), men's soccer (29–9–5), men's tennis (37–15), women's tennis (20–12) and volleyball (50–45); but UCF disputes the all time records in baseball, women's basketball, men's soccer, and volleyball, claiming the Bulls' records in these sports are 83–84, 29–14, 28–9–5, and 48–44, respectively. The only sports where UCF leads the all time head-to-head series are women's soccer (13–7–4), softball (23–19), and football (8–6). UCF leads the all time trophy series 7–0 (potentially 9–0 if the trophy continued to be awarded after they left the AAC for the Big 12).

The Knights also led overall while both schools were in the American Athletic Conference with a 123–81–4 record in conference games against the Bulls across all sports, whereas the all-time total across all sports is 314–245–9 in favor of the Bulls. The Knights lead 11–10–2 all time in conference tournament matches and the teams are tied 4–4–1 in conference championship games (though South Florida has actually won five conference championships head-to-head against the Knights; the tie denotes that their 2017 women's soccer title was won on penalty kicks). The Bulls are 6–4 against UCF in NCAA tournament games and 1–0 in other postseason meetings, making the overall postseason total 17–15–2 in favor of the Bulls.

As the schools are now in separate conferences, they meet less often in sporting events than they did from 2013–2023.

The most recent meeting was on March 9, 2025 in Men’s Tennis, a game that South Florida won 6–1 in Orlando.

There are currently no games scheduled between the two schools in any NCAA-sanctioned sport.