John Madden, the guy some of you know only from commercials or Frank Caliendo impressions, is actually a big-time sports announcer. Today, Madden callled it quits. The legendary Raiders coach-turned-football announcer explained his reason for quitting to NBC: "It’s time. I’m 73 years old. My 50th wedding anniversary is this fall. I have two great sons and their families and my five grandchildren are at an age now when they know when I’m home and, more importantly, when I’m not." See you on the golf course, John.