Erik Kramer just caught a huge break in his domestic violence case ... the ex-Bears QB won't spend a day behind bars despite admitting to roughing up his wife last year.
Kramer was arrested after he told cops he got physical with Cortney Baird during a fight at their Agoura Hills home in June 2018.
Baird claimed Kramer flipped out after she confronted him about an argument the two previously had ... saying Erik got violent and threw various household items at her.
Kramer was eventually charged with one count of misdemeanor battery for the incident .