How well-known are these all-time great sports figures?

[Bill77]

Just thought this would be fun to answer as honestly as I can as to who I knew of when I was 20 and who I know now that I am 40.

Babe Ruth 99% Y/Y
Muhammad Ali 99% Y/Y
Jackie Robinson 99% Y/Y
Pele 99% N/Y
Lou Gehrig 95% Y/Y
Mickey Mantle 95% Y/Y
Joe Frazier 80% Y/Y
Roberto Clemente 80% Y/Y
Joe DiMaggio 75% Y/Y
Ty Cobb 75% Y/Y
Shoeless Joe Jackson 60% Y/Y
Wilt Chamberlain 50% Y/Y (I remember him more from Conan the Destroyer)
Bill Russell 50% N/Y
Jack Dempsey 30% N/Y
Joe Louis 30% Y/Y (Again a movie reference Coming to America)
Rocky Marciano 30% Y/Y (See above)
Jim Thorpe 30% N/Y
Jack Johnson 25% N/Y
A.J. Foyt 25% Y/Y
Richard Petty 25% Y/Y
Honus Wagner 15% Y/Y
Satchel Paige 15% Y/Y
George Mikan 10% N/N
Rogers Hornsby 3% N/Y
Christy Mathewson 3% N/Y
Walter Johnson 3% N/Y
Bobby Jones 2% N/N
Bronko Nagurski 2% N/Y
Josh Gibson 2% N/Y
Georges Vezina 1% N/N