10. Joe Nathan
Joe Nathan missed all of 2010, and he was relatively ineffective in 2011, but the 38-year-old bounced back and enjoyed a very solid 2012 campaign with the Rangers. More importantly, he reminded us of his great years in Minnesota. Nathan has 298 career saves, including three seasons of more than 40, and is slightly ahead of Mariano Rivera in terms of all-time save percentage. He has saved more than 89 percent of his save opportunities, so that has to count for something, right?