Indianapolis Colts QB Chad Kelly is being sued by Von Miller's personal cameraman -- who claims Chad socked him in the face while drunk and high at a party in 2018 ... breaking his nose in the process.
The man behind the suit is Jackson Belcher, a videographer who's been working for Von Miller for years.
Belcher claims he was hired to cover Von's 2018 Halloween party at The Gothic Theater in Denver on Oct. 22 ... where he claims Kelly (Miller's Broncos teammate at the time) was boozing and using "recreational drugs.