Smith attended
Arizona State, where he did not play football until his junior season. Joining the team as a walk-on
wide receiver in 1964, Smith caught 9 passes for 129 yards and 2 touchdowns in 9 games. The following season, Smith was converted to tight end, and went on to catch 42 passes for 618 yards and 5 touchdowns. Selected in the
ninth round (118th overall) of the
1965 NFL draft, - where his teammates included
Charley Taylor, and his college friends included
David Mixner - Smith was also drafted by the
Kansas City Chiefs in the 18th round of the 1965 AFL Draft. Smith developed his Redskins career as a running and catching tight end under head coaches
Bill McPeak,
Otto Graham and most memorably under
Vince Lombardi, who had a positive approach to gay players. After Lombardi's death, under
George Allen his role changed to mainly blocking, leading the team to
Super Bowl VII at the end of the
1972 season. In the fourth quarter with the Redskins trailing the
Miami Dolphins, quarterback
Billy Kilmer tried a pass to Smith who was running across the end zone, but the ball hit the goal post. Although the Redskins lost the game 14–7,
Sports Illustrated called Smith "an outstanding receiver among tight ends, with the ability to break open for a long gain." In 1976 the Redskins signed the larger and faster
Jean Fugett, whom Smith helped and assisted in his integration to the team. In the same year, he was quietly approached by
Washington Star journalist Lynn Rosellini regarding her series of gay sports people. Smith contributed on the understanding that his name, team, or position would not be revealed. Rosellini opened her article with a description of Smith's hands, which led former teammate
Dave Kopay to recognize the player as Smith, and hence lead to Kopay telephoning Rosellini and becoming the first former football player to come out two days later. Despite his skills having diminished, coach Allen kept bringing Smith back into the Redskins roster due to his work ethic. Smith made one catch in 1977, and spent the 1978 season on the injured list. Smith caught 421 passes, including 60
touchdowns, a career record for tight ends at the time and the 17th highest total in NFL history. His record held for 27 years, beaten by
Shannon Sharpe on November 16, 2003. His 421 receptions were the third highest total ever by a tight end when he retired, trailing only Hall of Famers
Mike Ditka and
Jackie Smith. Smith was named
All-Pro twice and held several NFL records that stood for years. In 2011, the
Professional Football Researchers Association named Smith to the PRFA Hall of Very Good Class of 2011. In , as a part of a
USO tour in association with the NFL, Smith, along with other stars
John Brown,
Butch Byrd,
Fred Hoaglin,
George Kunz, and
Tom Woodeshick, visited and signed autographs for wounded military personnel in
Vietnam. From 1967 to 1970, Smith was a full time starter for the Redskins. He missed several games in 1971 to injury, but was back as a full-time starter the following season, and would be until his final season in 1977. During his career, Smith made several All-Pro teams. ==NFL career statistics==