 In particular, they noted the team's lack of discipline and unity down the stretch and considered these actions a reflection of Coughlin's coaching.Finally Tiki Barber, the Giants's all-time leading rusher and the catalyst for much of their success the previous two seasons, retired at just 31 years of age to enter a broadcasting career.The Giants decided to give Tom Coughlin one more chance heading into the 2007 season, giving him a one-year contract extension.