Drafted in 1991(!) LaTroy was a promising starting pitching prospect for the Minnesota Twins. He spent the next three years in the minors, and after being held back in Single A for a season, contemplated hanging up his spikes. His grandfather convinced him to stay in the game by asking "Where are you going to live? I don't allow quitters in this house."
Fast forward 15 years later, and LaTroy is still getting batters out in the playoffs, pitching for the Toronto Blue Jays, his 11th team in the big leagues. He is currently the oldest active major leaguer, and has recorded a save against all 30 major league teams (his save against the Twins came just this year after being traded to Toronto.).
I just realized that LaTroy is not on my PC list, so let's fix that right now!