Brown was not drafted by any professional team after leaving school in 1963. Coach Robinson convinced coach
Pop Ivy to give Brown a tryout with the
Houston Oilers of the
American Football League (AFL). Brown was signed, but was cut from the team during training camp. He was then signed by the AFL's
Denver Broncos and became a starting cornerback by the middle of his rookie season. In his second season (1964), Brown had 9 interceptions, including four against the
New York Jets in one game, won
All-AFL honors, and played in the
AFL All-Star Game where he was named outstanding defensive player. Brown became a Raider’s defensive captain. In 1969, he was presented with the Gorman Award as “'the player who best exemplifies the pride and spirit of the Oakland Raiders.'”
NFL Films immortalized Brown's play with a film clip of Brown running with the ball, appearing to be running straight to the camera. He was also given a popular
nickname as a result of
Bill King's radio call of the play: "He (Tarkenton) looks and throws...intercepted by the Oakland Raiders Willie Brown at the 30, 40, 50...he’s going all the way!...Old Man Willie!...Touchdown Raiders!" His record stood for 29 years, until it was broken by
Kelly Herndon's non-scoring 76-yard interception return from the end zone in
Super Bowl XL. Brown had five interception returns for touchdowns, two in the regular season and three in the playoffs. In addition to the touchdown scored against Tarkenton, he returned an interception against future Hall of Fame
Miami quarterback
Bob Griese in the 1970 playoffs. All three of Brown's playoff interception touchdown returns were against Hall of Fame quarterbacks. His two regular season interception touchdown returns were against Griese and future Hall of Fame Kansas City Chiefs quarterback
Len Dawson. == Legacy ==