| Number: | 86, 52 |
| Position: | Offensive guard, linebacker |
| Birth Date: | August 14, 1943 |
| Birth Place: | Pawnee, Oklahoma, U.S. |
| Height Ft: | 6 |
| Height In: | 3 |
| Weight Lb: | 231 |
| High School: | Bixby (OK) |
| College: | Tulsa |
| Draftyear: | 1965 |
| Draftround: | 14 |
| Draftpick: | 187 |
| Afldraftyear: | 1965 |
| Afldraftround: | 17 |
| Afldraftpick: | 131 |
| Pastteams: | |
| Highlights: |
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| Statlabel1: | Games played |
| Statvalue1: | 2 |
| Cflstatus: | Import |
| Pfr: | PortGa20 |
Garry Mark Porterfield (born August 4, 1943) is an American former professional football offensive guard in the National Football League (NFL) for the Dallas Cowboys. He was also a linebacker for the BC Lions in the Canadian Football League (CFL). He played college football at the University of Tulsa.
Porterfield attended Bixby High School. He accepted a football scholarship from the University of Tulsa, where he was a two-way end.[1]
Porterfield was selected by the Dallas Cowboys in the 14th round (187th overall) of the 1965 NFL draft.[2] He also was selected by the Oakland Raiders in the 17th round (131st overall) of the 1965 AFL Draft.[3] In December 1964, he opted to sign with the Cowboys.[4] He was considered a defensive end, before switching to linebacker and then to offensive guard. Porterfield played in two games for the Cowboys.[5] He was waived on September 30.[6]
In October 1965, he signed with the BC Lions of the Canadian Football League, where he played 2 seasons at outside linebacker.[5] He was released in 1967.
In 1968, he was named the offensive line coach at the University of Tulsa.