Kansas City Royals – 1969-2015 – W-L 3,623-3,852
The Royals have had an up-and-down history since their inception in 1969. They were highly successful in the 1970s and 80s, reaching the playoffs seven times from ‘76 through ‘85. After that, they failed to make the playoffs until 2014. All told, they’ve made the playoffs nine times, and they’ve won four pennants and two World Series, including the 2015 championship.