Class of 2016 Welcomed to Cooperstown by Huge Induction Ceremony Crowd
How many MLB HOFers have a blank hat on their plaque? - Quora
Hall of Fame open to Griffey's hat backwards on plaque
Hall of Fame considering backwards cap on Griffey plaque - Chicago Sun-Times
Ken Griffey Jr.: Road to Cooperstown by The News Tribune - Issuu
Should Ken Griffey Jr. Have A Backward Hat In His Hall Of Fame Plaque?
Class of 2016 Reflects on Election
Ken Griffey Jr. elected to Baseball Hall of Fame, sets voting record
Seattle Mariners announce plans to retire Ken Griffey Jr.'s No. 24
Ken Griffey Jr. may be allowed to have hat backwards on Hall of Fame plaque
Griffey to wear Mariners cap on Hall of Fame plaque
Mariners retire Ken Griffey Jr.'s No. 24