statesman.com — Updated: 9:27 p.m. Thursday, Feb. 23, 2012 Published: 9:24 p.m. Thursday, Feb. 23, 2012 Meet Mack Brown, the Schoolmaster. He began Longhorn spring football practice on Thursday with a whistle in his mouth and a ruler in his hand, all the better to rap the knuckles of anyone guilty of a lazy step.