There are 13 current NFL teams that have not won a championship since the advent of the Super Bowl (formerly the AFL-NFL Championship Game). These are the Atlanta Falcons, Philadelphia Eagles, Detroit Lions, Cincinnati Bengals, New Orleans Saints, Buffalo Bills, Carolina Panthers, Arizona (formerly St. Louis and Chicago) Cardinals, Houston Texans, Cleveland Browns, Tennessee Titans (formerly Houston Oilers), and Jacksonville Jaguars. Of those 13 teams, Detroit, Philadelphia, Buffalo, Arizona/St Louis/Chicago and Cleveland all won NFL championships before the AFL and NFL merged in 1970. Also, Buffalo and Houston won AFL titles prior to the merger. So the final answer is there are six NFL teams who have not won league championships since their inception. Of those, Carolina, Atlanta and Cincinnati have all won conference championships but failed to win the league championship.
the boston celtics
Greece has several divisions of professional football teams and a national team which won the European Championship a few years ago.
John cena - world championship The Undertaker - world heavyweight championship team Miz won team Kingston won
The Renault F1 Team won the 2005 Formula 1 Constructors championship. Fernando Alonso won the Drivers championship.
The N.F.L team that won the championship in 2008 was the New York Giants
The Chicago Fire of Major League Soccer (USA) won the championship in their first ever season. There may have been others in other leagues.
The 1898 Italian Football Championship was won by Genoa.
The 1900 Italian Football Championship was won by Genoa.
The 1903 Italian Football Championship was won by Genoa.
The 1904 Italian Football Championship was won by Genoa.
The 1905 Italian Football Championship was won by Juventus.
The 1907 Italian Football Championship was won by Milan.