PAT is also a
football (American, not
soccer)
abbreviation for "point after touchdown".
After a team scores a touchdown, they normally attempt to kick the ball through the goalposts. This is attemped from the 2 yard line in the NFL, 3 yard line in college football, and 5 yard line in the CFL. If done successfully, the team scores a point.
In the XFL, the PAT is the same as a "2-point conversion" in the NFL, where the team most run or throw from the 2 yard line, instead of kicking.