Twins' all-time retired numbers
Puerto Rican Twins don No. 21 in tribute to Roberto Clemente – Twin Cities
Joe was the rock': Twins retire Mauer's No. 7 in Target Field ceremony
Why don't the Miami Marlins have any retired numbers?
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New York Yankees Retired Numbers - Sports Illustrated
Minnesota Twins History
1 Legend from Every MLB Team Who Deserves to Have Their Number Retired, News, Scores, Highlights, Stats, and Rumors
For Many Latino Players, Roberto Clemente's Number Is Off Limits, Too - The New York Times
Minnesota Twins, History & Notable Players
The Hall of Fame case for Tony Oliva, one more time – Twins Time
Twins will retire Hall of Famer Jim Kaat's No. 36 jersey this season
Every MLB team's retired numbers – NBC Sports Chicago
