Burner was shown as a member of Magneto's mutant army during his rise to power.

In high school Mario showed the first flashes of his talent as a member to the school's forensic team.

He is shown as a member of the Hellfire Club.

A 1938 local news story shows him as a member of the Prospect Players, not yet sporting his trademark mustache.

He is shown as a member of Captain America's Invaders.

He is shown as a member of Alpha Flight.

He is shown as a member of the Frightful Four.

He is shown as a member of the Squadron Supreme.

He is shown as a member of the Dreadnoks.

He is shown as a prominent member of the Acolytes.