For the past 13 years, Jason Kelce's work days have been spent on the gridiron. He's now going to need something else to fill his time.The Eagles center , calling it quits after a sure-fire Hall-of-Fame career.Kelce has certainly made plenty of money in his career, meaning a day job isn't nece sarily in his future. He has collected more than $80 million from his time with the Eagles, , which is...