Of the 9 teams that joined in 1960 4 are below .500 and 5 are above .500
Bills .474
Dallas .579
Denver .532
KC .520
NE .518
NYJ .453
Oak .552
SD .497
Titans .491
It's not that bad, hey...we're better than the Jets! Actually the Bills, Jets, Chargers and Titans are very similar...
http://www.pro-football-reference.com/teams/