Top 75 Moments: No. 15 - Browns Complete Perfect Season in 1948

Cleveland swept through all seven teams in the All-America Football Conference for a perfect 14-0 record and captured its third championship

 Among intense racial segregation across the country, the Browns signed Bill Willis and Marion Motley, two players who demanded respect with their play on the field and built legendary careers in Cleveland

The Browns, named after their first head coach in Paul Brown, officially arrive in Cleveland and join the AAFC, starting the first of many memorable eras of football in Cleveland.

After watching the Browns relocate to Baltimore in 1995 and going three years without an NFL franchise, Cleveland welcomed the Browns back to the city as an expansion team, beginning a new era of football in Northeast Ohio.

In their inaugural season for the franchise, the Browns amassed a 12-2 record and defeated the Yankees for the first of four AAFC Championship wins.

 After four years of dominating the AAFC with four championships from 1946-49, the Browns officially joined the NFL.

Cleveland selected Brown with the sixth overall pick of the 1957 draft, adding a player that brought nine historic seasons to Cleveland and still stands as one of the greatest football players of all time.

The NFL felt the AAFC was inferior and looked down on the Cleveland Browns and other AAFC teams joining the league, but then the Browns shocked the world by defeating the Eagles 35-10.

Frank Ryan passed for three touchdowns to Gary Collins while Jim Brown rushed for 114 yards to push the Browns to their fourth NFL Championship win and first since 1955.

After dominating the AAFC with four championships in their first four years of existence, the Browns start strong in the NFL and win the league championship.

Baker Mayfield threw for three touchdowns while the Browns surged ahead with a historic 28-point first quarter to give Cleveland its first playoff win in over two decades

 In the final game of his career, Hall of Fame quarterback Otto Graham recorded four touchdowns and carried the Browns to back-to-back NFL Championships.

 Jim Brown began his legendary NFL career in 1957 by leading the league with 942 rushing yards and nine touchdowns, setting the tone for one of the best careers ever by an NFL player.

Hanford Dixon and Frank Minnifield begin barking in practice — and ended up creating the identity and signature sound of the Cleveland Browns fanbase

The Browns scored 10 points in the final minutes of regulation to push the game into overtime and eventually win, 23-20, to push Cleveland to a conference championship game for the first time since 1969

The Browns took down Joe Namath and the Jets in the NFL's first-ever Monday Night Football game on Sept. 21, 1970, at Cleveland Municipal Stadium

After 12 of 16 regular season games are decided by seven points or less, the 1980 Cleveland Browns are given the 'Kardiac Kids' nickname

Brown broke the NFL's single-season rushing record when he rushed for 152 yards in a 20-10 win against Washington on Nov. 16, 1958. Brown finished the game with 1,163 yards on the season and eclipsed the previous record from Steve Van Buren with 1,146 yards

Hall of Fame running back Jim Brown earned his fourth and final league MVP award in his last season of football