George Cooper Sr
Played by Lance Barber
George is Sheldon's father, and the football coach at the local high school.
Perceived as not very bright, George struggles to relate to his academic son.
Some people (George's mother-in-law in particular) suggest that George couldn't possibly be Sheldon's biological father, because of their obvious differences.
However, George is a loving father. He defends Sheldon wherever possible, and the pair share a mutual respect for one another.