John "Jack" Lanza (born October 14, 1935) is an American retired professional wrestler, better known by his ring name, Blackjack Lanza. Lanza was one-half of the tag team The Blackjacks with Blackjack Mulligan in the American Wrestling Association (AWA) and World Wide Wrestling Federation (WWWF). He is currently a producer in WWE. He was inducted into the WWE Hall of Fame in 2006.
- American Wrestling Association World Tag Team Championship
- NWA Georgia Television Championship
- NWA American Heavyweight Championship
- NWA American Tag Team Championship
- NWA Brass Knuckles Championship (Texas version)
- World Wrestling Association World Tag Team Championship
- WWWF World Tag Team Championship