Sports Bears TE Zach Miller retires from NFL after undergoing nine surgeries in aftermath of leg injury April 16, 2019 Michael Middlehurst-Schwartz, USA TODAY Comments Off on Bears TE Zach Miller retires from NFL after undergoing nine surgeries in aftermath of leg injury Zach Miller underwent nine surgeries and nearly lost his leg to amputation in the aftermath of a gruesome knee injury in 2017.