If the defense does not control the ball before it goes out of play, it is either a GRD or a HR depending on what the ball did before going out of play. For example,
- the ball hits off the fielder's glove (or their head) in fair territory and goes over the outfield fence in fair territory - HR
- the ball hits off the fielder's glove in fair territory and goes over the outfield fence in foul territory - GRD
- the ball hits off the fielder's glove in fair territory and hits the ground or some other object (like the front of the fence) then goes into DBT - GRD
SamC