Philadelphia Eagles star Jason Kelce is retiring after 13 seasons with the team, and on Monday he delivered a teary, heartfelt retirement announcement that paid tribute to his father, his wife and kids, saying that being a father is the most important thing a man can do in life. The elder Kelce brother has been hinting about his pending retirement for some time, but on Monday he confirmed the plans with his morning news conference. Kelce, 36, has a lot to be proud of. He has always been a solid leader for the Eagles, and he is one of the few players of the National Football League to play his …