Detroit Lions' kicker Jason Hanson is retiring after 21 NFL seasons, announcing his decision Thursday. The 42-year-old Hanson thought about returning, but problems with his heel prompted him to call it a career.

"It's time," Hanson said. "I gave serious thought and consideration to playing in 2013. While the determination and willpower are still there, the wear and tear on my body, especially the issues I had and still have with my heel, have convinced me that it's time to retire."