1956: Retzlaff was drafted by the Lions in the 22nd round in 1953 but didn't make his NFL debut until 1956 with the Eagles. In his first season, he had 12 catches for 159 yards.
1957: In Year 2, Retzlaff had 10 catches for 120 yards in 12 games.
1958: With a league-leading 56 catches, Retzlaff made his first Pro Bowl and All-Pro teams. He added 766 receiving yards and two touchdowns.
1959: Retzlaff posted 595 receiving yards and one touchdown.
1960: Helping the Eagles win the NFL Championship, Retzlaff had 46 receptions for 826 receiving yards and five touchdowns in another Pro Bowl season.
1961: Retzlaff had 50 grabs for 769 yards and eight touchdowns.
1962: Playing eight games, Retzlaff registered 30 catches for 584 yards and three touchdowns.
1963: Playing tight end, Retzlaff returned to the Pro Bowl with a 57-catch, 895-yard season, adding four touchdowns.
1964: Retzlaff made the Pro Bowl and earned second-team All-Pro honors after he had 51 catches for 855 yards and eight touchdowns.
1965: In his age-34 season, Retzlaff had the best year of his career. He posted career-highs in receptions (66), receiving yards (1,190) and touchdown grabs (10). He finished fourth in AP MVP voting and was named first-team All-Pro along with making the Pro Bowl.
1966: Retzlaff's final season of his career saw him put up 653 receiving yards on 40 grabs and six touchdowns.
- 5-time Pro Bowl selection
- 1965 Bert Bell Award Winner
- No. 2 in Eagles history with 7,412 career receiving yards
- No. 3 in team history with 452 career receptions
- No. 5 in franchise history with 47 career touchdown catches
