Troy Aikman had a passing average of 7.2 yards per attempt between the 1990 and 1998 seasons.

troy aikman averages from 1990 to 1998
Interpreted as:
Troy Aikman passing averages from 1990 to 1998
NAMEGPAVGCMPATTPCTYDSYDS/GTDTD%INTINT%SCKSCKYRATE
Troy AikmanTroy Aikman1297.22,3243,71862.526,597206.21323.6972.62081,37284.9
StatMuse has season-level data for yards per attempt going back to the 1932 season.

See Trending NFL Searches