16.
Green Bay had 11--Bart Starr, Paul Horning, Jim Taylor, Forrest Gregg, Jerry Kramer, Willie Davis, Henry Jordan, Dave Robinson, Ray Nitschke, Herb Adderly and Willie Wood. (12 if you count Jim Ringo who played in 1963.)
Baltimore had 5--all on offense--John Unitas, Jim Parker, Raymond Berry, Lenny Moore and John Mackey.