Napier said it was time to “move on” from Cox and said it was a “cumulative effect” that led to Cox’s dismissal, not one incident.
A redshirt junior, Cox leads the team with eight tackles for loss. In eight games, he has 35 tackles, 2 sacks and 9 quarterback hurries.
Cox began his career at Georgia before transferring to Florida under former coach Dan Mullen for the 2019 season.
Mullen was fired last November and replaced by Billy Napier, who is off to a 4-4 start this season.
Florida lost to No. 1 Georgia, 42-20, this past Saturday in Jacksonville. Cox had two tackles in the game.
The Gators play at Texas A&M on Saturday.