Michael James Shaw was taken aback when he saw Mercer was given his first name on "TWD."
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- Michael James Shaw plays the head of the Commonwealth militia, Mercer, on "The Walking Dead."
- In the comics, we never learn Mercer's first name. The show names him Mike.
- Shaw told Insider he was surprised to learn they gave the character his first name.
In "The Walking Dead" comic, Mercer, the tough-as-nails leader of the Commonwealth militia, was never given a first name.