His name is a parenting epithet. Overcoach your kid, get too excited about a touchdown or a home run or a goal, and you might hear it, even in jest: You're just like Marv Marinovich! Look at Marv Marinovich over here! The story is part of American lore, the ultimate in Sports Dad Goes Overboard. BRED TO BE A SUPERSTAR, read the Feb. 22, 1988, Sports Illustrated headline. And the subhead: Todd Marinovich was groomed from infancy to be a top-notch quarterback. Infancy was not hyperbole. America's first test-tube athlete, they called Todd. The Robo QB. Marv stretched his son's...