Because Mack was a very good Head Coach who especially excelled in 3 areas: recruiting, game management and empowering FG kickers to kick with confidence. Mack is the 2nd best Head Coach in UT Football history.
But he presided over blowing Big 12 Titles in ’01, ‘02, ‘06 and ‘08, was curb-stomped by OU twice and made the most colossally dumb strategic decisions ever when, with Saban-envy, he scrapped the passing-spread O for the NFL, QB under center O, before the ’10 season. Texas lacked the O-linemen, physical culture and QB to play the NFL, deep dropback pass, “downhill running game” O. That decision ruined Garrett Gilbert (who was decidedly suited for the Greg Davis/Colt McCoy passing spread O) and led to the ruination of Longhorn Football, still wandering in the wilderness of mediocrity after almost 13 seasons.