Kennedy attended the University of Washington, where he played for the Washington Huskies football team. In 1991 and 1992, he was the recipient of the Morris Trophy, awarded annually to the outstanding offensive lineman in the Pacific-10 Conference. In 1992, he was also recognized as a consensus first-team All-American.
Kennedy currently works for Fox Sports Radio as show co-host. He also has called Pac-10 college football games as the color analyst and as a track reporter during NASCAR races. In 2013, he joined the Oakland Raiders radio broadcast team. He has also been a guest co-host on San Francisco radio station 95.7 The Game.
In May 2009, Kennedy became an agent with Farmers Insurance in Glendale, Arizona.
Asked by InsuranceQuotes.com whether he prefers playing football or selling insurance, Kennedy said: "You know, to each his own. I've always preferred a challenge in my lifetime, so whatever I did — whether it was sports or school or now this career — it's been challenging and rewarding in its own way. It's a matter of trying to be the best that you can be in your surroundings." 
His birth name was Tamerlane Fizel Kennedy Jr., but his mother called him 'Little Lincoln', referring to their shared birthday (February 12). The nickname stuck, and Lincoln had it legally changed after college.
He also made an appearance in the movie The Marine.
Kennedy held the all-time record on the "Wall of Fame" at Seattle eatery Shultzy's Sausage before the restaurant changed locations and did away with the Wall. In his record-setting effort, he consumed 11 of the restaurant's signature link sausages on French rolls and a large Coca-Cola within one hour.