Backup NFL quarterback isn't a bad gig if you can get it. Take 41-year-old Jon Kitna, who retired from the Dallas Cowboys in 2012 after 15 years in the NFL. He now teaches math and coaches football at Lincoln High School in his hometown of Tacoma, Wash.
And his success in the classroom is even more remarkable. When he agreed to work at Lincoln, he asked the principal to round up the worst students – the ones other teachers didn't want – and give them to him. The staff tried to talk him out of it, but he wouldn't have it. At the end of his first year, his students went from disinterested troublemakers to the second-highest scoring on the school's math assessments.
An outspoken Christian, he has devoted his life after the NFL to serving the young people at the high school where he was a star quarterback in the early '90s.