Sam is a character mentioned in AMC's The Walking Dead.
Pre-Apocalypse
Nothing is known about Sam's life prior or as the outbreak began. He may have been related to the walker that Carl Grimes found at his house.
Post-Apocalypse
It is unknown if Sam survived the outbreak.
Season 4
"After"
Carl Grimes enters Sam's house in order to look for supplies. While there, Carl encounters a walker who he promptly manages to lock in Sam's former room. Carl leaves a message to Rick about how he lost his shoe to the walker before going to the roof to eat a can of pudding.
Trivia
- By taking a look at Sam's room, it can be assumed that he was a young child.