He was portrayed by Adam Goldberg.
Mr. Numbers worked for the Fargo Crime Syndicate as a hitman and enforcer. He was often paired with Mr. Wrench due to his ability to translate Wrench's sign language. Following the murder of Sam Hess, Wrench and Numbers were sent to investigate and discover who commited the murder. Their search led them to Lenny Potts, a local man who resembled Lorne Malvo. They took Lenny captive but were told that he is not the man they're looking for. They then took him out to a frozen lake, where they dropped him into a hole in the ice.
Their search later leads them to Lester Nygaard, who had a known history of being bullied by Hess. They kidnap him and take him out to be dropped into the lake, but he tases Numbers and escapes. Lester gets away by punching a police officer who happened to be on a nearby road, forcing him to take him into custody and drive him into town. Wrench and Numbers then fake a drunken brawl in a bar in order to be locked into the drunk tank along with Lester.
While locked up, Wrench and Numbers interrogate Lester. They put pressure onto his infected hand wound and muffle his screams with a sock until he gives up Malvo's name. Wrench and Numbers are then bailed out of jail, presumably by the Syndicate. They also retrieve a police file on Malvo, giving them enough information to track him down.
They later find Malvo and ambush him during a whiteout. They get in front of and behind Malvo's car and trap him between their cars. Wrench gets out and fires his handgun at Malvo, but is knocked down when Malvo slams the car door into him. Numbers then exits his car with an assault rifle and begins shooting at Malvo, but he escapes yet again and they lose him in the whiteout. Malvo manages to lure Numbers into a trap by cutting his hand and leaving a trail of blood in the snow. After following the trail, Numbers is stabbed in the back by Malvo. He tortures Numbers by twisting the knife until he reveals that the Fargo Syndicate had sent them. Malvo then slits Numbers' throat and leaves him to bleed out in the snow.