Fumble

A Fumble is when a player has possession of the ball and suddenly drops it. To count a fumble as a fumble, the player must of had possession of the ball for 3 seconds, before dropping the ball.

Recovering a Fumble
Anyone on the field can recover a fumble.

Offense Fumble
If the Offensive side fumbles the ball, and the defensive side recovers the fumble, the offensive side loses possession of the ball. This makes it first down for opposing team