And I reluctantly put the Browns in even though they have a historically better winning percentage than several other franchises. No SB appearances, plus the bitching I'd hear if I didn't include them, made me include them
NBA
Memphis/Vancouver Grizzlies: 4 playoff appearances, 0 finals appearances, 450 wins over 17 seasons (.352 winning percentage)
Buffalo Braves/San Diego/LA Clippers: 7 playoff appearances, 0 finals appearances, 1207 wins over 41 seasons (.362)
NHL
Columbus Blue Jackets: 1 playoff appearance, 0 finals appearances, 313 wins over 10 seasons (.398)
Atlanta Thrashers: 1 playoff appearance, 0 finals appearances, 342 wins over 12 seasons (.399)
MLB
San Diego Padres: 5 playoff appearances, 2 WS appearances, no titles, 3,169 wins over 41 seasons (.463)
Seattle Mariners: 4 playoff appearances, 0 WS appearances, 2,589 wins over 33 seasons (.467)
Montreal Expos/Washington Nationals: 1 playoff appearance, 0 WS appearances, 3,247 wins over 41 seasons (.475)
NFL (since 1966 season)
Detroit Lions: 9 playoff appearances, 0 Super Bowl appearances, 276 wins in 44 seasons (.407)
St. Louis/Phoenix/Arizona Cardinals: 6 playoff appearances, 1 Super Bowl appearance, 0 Super Bowl wins, 283 wins in 44 seasons (.417)
Cleveland Browns: 14 playoff appearances, 0 Super Bowl appearances, 296 wins in 44 seasons (.466)