The NFL's best players by jersey number: Nos. 50-99 - Sports Illustrated
The Best (and Worst) Baseball Jersey Numbers — Clubbie
Baseball great David Ortiz's Hall of Fame induction highlights a big problem
Cardinals 2016 Hall of Fame Class Announced
Uniform number (Major League Baseball) - Wikipedia
Every uniform number ever, ranked by value
What the Yankees' uniform number crunch could cost MLB's managers and coaches - The Athletic
History of retired numbers dates back to Lou Gehrig Day
Carlos Beltran Headlines New Baseball Hall of Fame Candidates - The New York Times
Mariners to induct Felix Hernandez into team Hall of Fame - NBC Sports
Who is the best Oakland A's player not in the Hall of Fame? Moneyball Years - Athletics Nation
Ken Griffey Jr. To Join Mariners Hall of Fame, by Mariners PR