Muhammad Ali won the Sports Illustrated Sportsman of the Year Award once, in 1974.
In 2004 the whole Boston Red Sox team received the Sportsman of the Year Award.
Brett Favre did of course!
1974 - Al Kaline
1971 Lee Trevino Golf PGA Player of the Year
1977 Steve Cauthen Horse racing Eclipse Award for Outstanding Jockey
Tom Seaver, New York Mets pitcher.
1970 Bobby Orr Hockey NHL MVP
1964 Ken Venturi Golf U.S. Open Champion