Green was recruited by Purdue out of Crestwood high school in Virginia. Green was an AP and UPI All-American in 1970, and also was named a team captain during his senior year. The previous season, Green's blocking played a role in the team finishing with an 8-2 record under head coachJack Mollenkopf. The quarterback on that team was Mike Phipps, who would be the first round draft choice of the Cleveland Browns in the next NFL draft. That 1969 team finished the season ranked number 18 in the AP poll. While at Purdue, Green majored in Physical Education. In Green's senior year, Purdue went 4-6 under head coach Bob DeMoss, with one of the highlights of the season being an upset 26-14 win over Stanford. Some of Green's teammates on that Purdue squad that would go on to play in the NFL include quarterback Gary Danielson, Running backOtis Armstrong and wide receiverDarryl Stingley.
NFL
Green was drafted by the Buffalo Bills in the fifth round, one round after Jim Braxton, who'd be a back field mate of O.J. Simpson and part of the Bills famed "Electric Co." offense of the 1970s. Green played in ten games his rookie season, starting nine of them as the Bills struggled to an 1-13 record under coach Harvey Johnson. After that season, Johnson was fired and Lou Saban was named as head coach. Saban made Green the full-time starter at right tackle, as the Bills improved to 4-9-1. The next season the Bills improved to 9-5 as Green along with Dave Foley, Reggie McKenzie, Bruce Jarvis, and Joe Delamielleure formed the line that helped Simpson rush for 2,003 yards in a season. In 1974, Green only started 10 games, but he recorded his only pass reception, a one yarder from quarterback Joe Ferguson in a 24-16 loss to the Miami Dolphins. 1975 would be Green's last as a full-time starter. He started all 14 games that year, eleven in 1976. He played for the Philadelphia Eagles in 1977 as a back-up, and spent 1978 seeing spot duty for the Detroit Lions. He retired after that season.
Post career and death
Green struggled with life after pro football. He soon separated from his wife and battled drug use. He lost the lease on the home he was in and ended up living for a time in a shelter in Hagerstown, Maryland and worked there as a night monitor. On August, 28th, 2019, the Buffalo Bills issued a press release that confirmed that Green had passed away, though an exact cause was not announced.