Morgan played high school football at Easley High School in Easley, South Carolina. In 1972, his team won a state championship. Morgan went on to play college football for the University of Tennessee. Morgan was selected out of the University of Tennessee in the first round of the 1977 NFL Draft (25th overall). He holds the all-purpose yards record for the University of Tennessee, which stands at 4,642.
1973: 22 catches for 522 yards with 4 TD.
1974: 128 carries for 723 yards with 11 TD. 10 catches for 234 yards with 2 TD.
Morgan was one of the fastest receivers in the NFL early in his career and averaged over 20 yards per reception his first six seasons, with a career high 24.1 yards per reception in 1978. He led the NFL in yards per reception in 1979, 1980 and 1981.
Stanley topped 1,000 receiving yards three times (1979, 1981 & 1986). Morgan appeared in four Pro Bowls (1979, 1980, 1986 & 1987) and was selected 2nd Team All-Pro in 1980 & 1986. He finished his career with 557 receptions for 10,716 yards and 72 touchdowns, along with 121 rushing yards. His 10,352 receiving yards with the Patriots set their franchise record.
His best season as a Patriot was 1986 when he caught 84 passes for 1,491 yards and 10 touchdowns, leading the Patriots to the AFC East Title. Morgan was selected into the New England Patriots Hall of Fame. The ceremony took place on August 27, 2007.