Evil Dead was Bruce Campbell's first film, so you may be asking, "what could have come before?"
In 1972, Bruce Campbell appeared in a short film directed by school chum Josh Becker. Becker would go on to work on all the Evil Dead movies with Campbell and Sam Raimi, as well as writing/directing movies like Lunatics: A Love Story and Stryker's War.
But at the age of 14, Bruce Campbell appeared in Becker's first short film, "Oedipus Rex." Based on the Greek tragedy, the short was shot on a lunch break at school (evident by the chalkboard title cards and the auditorium background). It is a silent film, and is pretty much what you would expect a 14-year-old to shoot during his lunch period.