She had more of an impact on her sport that arguably anyone in U.S. history.Like Babe Ruth in baseball and Muhammad Ali in boxing, Pat Summitt made an everlasting impression on women’s basketball.When she became head coach of the Lady Vols in 1974, she was barely older than her players. But that didn’t stop the 22-year-old from building one of the greatest programs in college sports.When Summitt got her start, women’s college basketball was an afterthought. It wasn’t even formally recognized by the NCAA. On road games, Summitt had to drive the team van.She must have remembered those days behind the wheel because Summitt will be forever known for her drive to win.She wasn’t just a basketball coach.