Gartrell is a versatile defender in the box, as he can play outside the tackle as a 5 tech or kick inside as a B-Gap player at the 4i, and he can play off the ball at linebacker. His first step off the line of scrimmage is explosive, allowing him to penetrate the backfield and force the QB and RB mesh to be rushed. This can make it difficult for QBs to confidently make decisions in run reads. His combination of speed and ability to change direction makes it possible for him to play both the QB and RB at times. This same speed and explosive get-off comes into play when rushing the passer as well, gaining ground on offensive linemen before they have a chance to gain depth in their kick step.

Gartrell is a versatile defender in the box, as he can play outside the tackle as a 5 tech or kick inside as a B-Gap player at the 4i, and he can play off the ball at linebacker. His first step off the line of scrimmage is explosive, allowing him to penetrate the backfield and force the QB and RB mesh to be rushed. This can make it difficult for QBs to confidently make decisions in run reads. His combination of speed and ability to change direction makes it possible for him to play both the QB and RB at times. This same speed and explosive get-off comes into play when rushing the passer as well, gaining ground on offensive linemen before they have a chance to gain depth in their kick step.