John Elway.
Danny White
There has been no player that wore #10 for the Steelers and made it into the NFL Hall of Fame.
Daryl "Moose" Johnson for the Cowboys and Stephen Davis for the Panthers wore number 48
Jackie Robinson (MLB), James Worthy (NBA), Ronnie Lott (NFL)
Jack
Sean Taylor was a famous NFL player who wore Number 21 for the Washington Redskins. He was murdered when he was shot during a botched robbery/home invasion.
Justin Gage wore # 12 for the Bears and did not retire.
One of the most famous sports players to wear the number 22 is Hall of Fame basketball player Elgin Baylor. He had a prolific career with the Los Angeles Lakers, where he was known for his scoring ability and athleticism. In addition, NFL running back Emmitt Smith, who is regarded as one of the greatest in his position, also wore the number 22 during his time with the Dallas Cowboys.
Check the offical NFL website for all that information.
Hall of Fame baseball player Harmon Killebrew, former NFL MVP Mark Moseley.
Famous athletes who wore uniform number 38 include former NFL quarterback Jeff Blake and MLB pitcher John Smoltz. Additionally, NBA player J.R. Smith also donned the number during his career. While not as widely recognized as some other numbers, 38 has been associated with notable performances in various sports.
Martrez Milner- Atlanta Falcons #88