Franchise histories

Each franchise page links to every available roster season for that code. Season pages use the team name from that year's source article.

• Arizona Diamondbacks — 28 seasons
• Atlanta Braves — 73 seasons
• Baltimore Orioles — 125 seasons
• Boston Red Sox — 125 seasons
• Chicago Cubs — 125 seasons
• Chicago White Sox — 122 seasons
• Cincinnati Reds — 119 seasons
• Cleveland Indians — 119 seasons
• Colorado Rockies — 33 seasons
• Detroit Tigers — 125 seasons
• Miami Marlins — 33 seasons
• Houston Astros — 64 seasons
• Kansas City Royals — 57 seasons
• Los Angeles Angels — 56 seasons
• Los Angeles Dodgers — 86 seasons
• Milwaukee Brewers — 57 seasons
• Minnesota Twins — 65 seasons
• Montreal Expos — 36 seasons
• New York Mets — 64 seasons
• New York Yankees — 123 seasons
• Oakland Athletics — 124 seasons
• Philadelphia Phillies — 124 seasons
• Pittsburgh Pirates — 125 seasons
• San Diego Padres — 57 seasons
• Seattle Mariners — 49 seasons
• San Francisco Giants — 92 seasons
• St. Louis Cardinals — 125 seasons
• Tampa Bay Rays — 28 seasons
• Texas Rangers — 54 seasons
• Toronto Blue Jays — 49 seasons
• Washington Nationals — 92 seasons