Chad Pennington: Miami Dolphins: Chad Pennington suffered yet another career-threatening shoulder injury this week in the Miami Dolphins Week 10 NFL game against the Tennessee Titans, and you've got to feel for Chad.

He already has had three major shoulder surgeries, and this last injury could spell an end to Pennington's up and down career.

With his sad story in mind, here's a list of five athletes who's situations have you feeling sorry for them, despite their status as pro athletes.