WATCH Keith Olbermann's Heartfelt Farewell Tribute to Retiring David Letterman [VIDEO]

Earlier this week, CBS's The Late Show host David Letterman announced his retirement from television in 2015. While we have about a year or so until he signs off for the last time, some fellow personalities have already started dedicating some time on their own shows to pay tribute to Dave. One in particular is a friend of Dave's, ESPN's Keith Olbermann, who compared the Late Show host to Babe Ruth in that he is the best at what he does. Read More »