John Crimber is an American professional rodeo cowboy who specializes in bull riding. He competes in the Professional Bull Riders (PBR) and Professional Rodeo Cowboys Association (PRCA) circuits. He is nicknamed "Mr. October" for his clutch walk-offs in the PBR Team Series Championship. He won the PBR Team Series Regular-Season MVP title in 2024 and 2025, while winning the PBR Team Series Championship MVP title in 2024. He won the PBR World Championship in 2026.