The Dolphins on Saturday placed Trent Green on injured reserve, leaving many to wonder if the veteran has played his last game in the NFL. Green has been sidelined since suffering a concussion against the Texans on October 7 when he took a knee to the head while trying to throw a block against Houston's Travis Johnson. Though Green has publicly stated that he is feeling no ill-effects from the concussion, this latest move is fueling speculation that the 37-year-old's career is at an end.