| Position: | Defensive tackle |
| Number: | 98, 96 |
| Birth Date: | December 10, 1973 |
| Birth Place: | Ashland, Kentucky, U.S. |
| Height Ft: | 6 |
| Height In: | 5 |
| Weight Lbs: | 295 |
| Undraftedyear: | 1997 |
| High School: | Lloyd Memorial (Erlanger, Kentucky) |
| College: | Marshall |
| Pastteams: |
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| Statlabel1: | Tackles |
| Statvalue1: | 48 |
| Statlabel2: | Sacks |
| Statvalue2: | 8 |
| Statlabel3: | Interceptions |
| Statvalue3: | 1 |
| Pfr: | LyonBi20 |
William Morton Lyon (born December 10, 1973) is a former American football defensive tackle in the National Football League (NFL) who played for the Green Bay Packers and the Minnesota Vikings.[1] Lyon played college football for Marshall University and played professionally for 6 seasons. He retired in 2003.[2]