The Primary Packages
The first thing to say is that the NFL clearly favors three packages: 11 personnel (one back, one tight end, and three receivers), 12 personnel (one back, two tight ends, and two receivers) and 21 personnel (two backs, one tight end, and two receivers). The table below that indicates the league average for each:
11 Personnel 12 Personnel 21 Personnel
51.62% 19.74% 13.26%