| Number: | 67, 64, 75, 74, 76, 93 |
| Position: | Nose tackle |
| Birth Date: | 7 November 1956 |
| Birth Place: | Freer, Texas, U.S. |
| Height Ft: | 6 |
| Height In: | 3 |
| Weight Lb: | 255 |
| High School: | Freer (Freer, Texas) |
| College: | Texas |
| Draftyear: | 1980 |
| Draftround: | 6 |
| Draftpick: | 142 |
| Teams: |
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| Highlights: | |
| Statlabel1: | Sacks |
| Statvalue1: | 0.5 |
| Statlabel2: | Fumble recoveries |
| Statvalue2: | 1 |
| Pfr: | AckeBi20 |
William Berry Acker, Jr. (born November 7, 1956) is a former professional American football player who played defensive tackle for six seasons for the St. Louis Cardinals, the Kansas City Chiefs, and the Buffalo Bills. His brother Jim is a former MLB pitcher.[1]