The 31-year-old actor, best known for his role as Harrison Wright on the ABC drama, was celebrating a couple's engagement at Gabe's Bar and Grill in L.A. on March 15, when he got into an argument with another attendee.
According to TMZ, Short was upset after the man made a comment along the lines of: "You might be richer than me but I get my girls to buy me everything I want including your wife."
Short reportedly "sucker punched" the man after his comment, leaving him unconscious and with a broken nose. Short left the scene soon after the incident, and an ambulance later came to take the 37-year-old man to a nearby hospital.
Police are currently investigating the incident as a criminal battery offense.
Back in 2010, Short was involved in a similar altercation knocking a man's teeth from his mouth after getting into an argument with him at an L.A. Fitness gym.