Trivia: John Chisum convinces Pat Garrett to accept a job as the new Lincoln County sheriff. James Coburn (Chisum) himself played Garrett in the Sam Peckinpah movie "Pat Garrett and Billy the Kid."
Trivia: When the prisoners escape the pit that Doc and Chavez were held in, there's a prisoner that gets out, gets a gun, and tries to shoot one of the guards, only to be shot in the chest and do a back flip back into the pit. It's Jon Bon Jovi (who did the soundtrack for the movie).
Answer: Doc says in the movie he is married with kids. So you have to assume he married her.