It is officially 21 days until the 2025 MLB Opening Day! For our official countdown here on FlurrySports, we will be releasing the best players in MLB history to wear the jersey number of the number of days remaining. Follow along to keep track of how many days until the MLB season, and share who YOU think the best player to ever wear that jersey number is! Click here to see the best MLB players from yesterday.
With 21 days until the 2025 MLB Opening Day, we give you the best MLB players to wear #21. Of course, some of the all-time greats at this number will still be playing this season. They have the ability to continue rising up this list! The official ranking of these players is based on the Wins Above Replacement (WAR) from Baseball Reference.
Please note that every player listed from now until the end of the countdown will only be used once. So, for example, Barry Bonds wore both 24 and 25 in his career, but he will only be chosen for one number. Basically, treat it as when you hear this player’s name, this is the number that you think of. A good rule of thumb is if the player wore a certain number for 10 or more years, they are probably going to be featured, with some exceptions.
Without further ado, here are the all-time best players to wear #21 in MLB history.
When is MLB Opening Day 2025?
You may be wondering when the 2025 MLB Opening Day is! For our countdown here on FlurrySports, we will be listing the five greatest players in MLB history to wear the jersey number that corresponds with the number of days remaining. The 2025 MLB Opening Day is March 27, 2025. With that being 21 days from now, here are the best players to wear 21 in MLB history!
Best Players to Wear 21 in MLB History
1) Roger Clemens, P (1984-2007)
WAR: 139.2
MLB Draft: 1983, Round 1, Pick 19 to the Boston Red Sox
11x All-Star | 1x AL MVP | 7x Cy Young Winner | 2x Pitching Triple Crown | 7x ERA Leader | 4x MLB Wins Leader | 5x AL Strikeout Leader | MLB All-Century Team
World Series Champion (1999, 2000)
MLB Record 20 Strikeouts in a 9 Inning Game (2x)
2) Warren Spahn, P (1942, 1946-65)
WAR: 100.1
MLB Draft: 1942 by the Boston/Milwaukee Braves
17x All-Star | 1x Cy Young Winner | 8x NL Wins Leader | 3x NL ERA Leader | 4x NL Strikeout Leader | Baseball Hall of Fame (1973)
World Series Champion (1957)
Pitched Two No-Hitters
3) Roberto Clemente, OF (1955-72)
WAR: 94.9
MLB Draft: 1954, signed by the Brooklyn Dodgers
15x All-Star | 1x NL MVP | 1x World Series MVP | 12x Gold Glove | 1x All-MLB Second Team | 4x NL Batting Champion | Baseball Hall of Fame (1973)
World Series Champion (1960, 1971)
4) Arky Vaughn, SS (1932-43, 1947-48)
WAR: 77.9
MLB Draft: 1931, Signed to the Chicago Cubs
9x All-Star | 1x NL Batting Champion | 1x NL Stolen Base Leader | Baseball Hall of Fame (1985)
5) Sammy Sosa, RF (1989-2005, 2007)
WAR: 58.6
MLB Draft: 1985, Signed by the Texas Rangers
7x All-Star | 1x NL MVP | 6x Silver Slugger | 1x NL Hank Aaron Award | 1x Roberto Clemente Award | 2x NL Home Run Leader | 2x NL RBI Leader
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