 During training camp, Ryan Tannehill aggravated a knee injury that ended his 2016 season, ending his 2017 season before it started when he opted for surgery.As a result, the Dolphins signed former Chicago Bears quarterback Jay Cutler out of retirement to replace Tannehill.The Dolphins fell short of repeating their 2016 success, finishing with a 6-10 record and trading away star running back Jay Ajayi to the Philadelphia Eagles.