Despite having more career interceptions than all other cornerbacks on the team, Boyd is the only member from that group not in the Pro Football Hall of Fame.
Boyd earned Texas All-State football honors during his junior and senior years.
As a senior halfback, Boyd recorded 220 carries for 1,719 yards and 26 touchdowns while also making 10 interceptions as a defensive back.
[3] Following his senior season, Boyd was selected to play in the 1956 Oil Bowl high school all-star game.
Boyd also contributed with four fumble recoveries, one half sack, and three punt returns for 23 yards.
Boyd recorded his first NFL rushing attempt in week 10 on a 15-yard fake field goal run against the Green Bay Packers.
[13] Boyd suffered a separated shoulder during a 1963 pre-season game, which sidelined him for the first two weeks of the 1963 regular season.
[13] His best performance of the season came against the San Francisco 49ers in week 12, where he recorded two interceptions for 28 yards in the Colts' 14–3 victory.
In the Divisional Round playoff game against the Green Bay Packers, Boyd had one interception for six yards in a controversial 10–13 overtime loss.
[13] In week three, Boyd intercepted Chicago Bears quarterback Rudy Bukich and returned the ball for a 37-yard touchdown.
[22] Boyd started the season strong, and in week one recorded two interceptions while returning one for a 30-yard touchdown against quarterback Randy Johnson and the Atlanta Falcons.
Although the Colts finished first in the Coastal Division with an 11-1-2 record, they did not participate in the playoffs due to a point-differential tiebreaker with the Los Angeles Rams.
The teams had tied in mid-October in Baltimore and the Colts entered the last game undefeated, but lost 34–10 to the Rams in Los Angeles.
[13] Boyd and linebacker Mike Curtis led the Colts defense as the NFL's best in scoring and takeaways.
In the Western Conference Championship game against the Minnesota Vikings, Boyd intercepted a throw from quarterback Joe Kapp, returning it for 20 yards.
In Super Bowl III, Boyd recorded two tackles, but the Colts lost 16–7 in an upset to the New York Jets.
[29] In 2017, the Professional Football Researchers Association named Boyd to the PFRA Hall of Very Good Class of 2017.
Anchored by safeties Rick Volk and Jerry Logan, the Colts defense helped the team to an 11-2-1 record.
[31] In October 1981, Boyd was asked by Colts head coach Mike McCormack to return to the team as a defensive assistant.
[33] Boyd was a close friend of Colts quarterback Johnny Unitas, and the pair partnered together in several Baltimore area business ventures.
[34] The pair were also involved in the air freight business before briefly opening another Towson restaurant, Baby Doe's Mining Co., in 1981.
During the NFL offseason, Boyd held various jobs as a sales representative in the Baltimore area.