His fellow players immediately attacked him on the field to the point that officials had to pull them off the 22-year-old.
The young footballer was said to have badly injured in the on-field attack, according to Denis Onyon, chairman of the Agoro Sub County in Uganda.
When the match was over, Mr Owaci is said to have resumed the brawl with his teammates by pushing one of them off their bikes in an act of revenge.
Mr Onyon said in a statement: “Later after the game, the deceased in a revenge act pushed one of the people that had earlier beaten him, from the bicycle which provoked another fight.
“The deceased collapsed a few metres away from the fight scene and was rushed to Agoro Health Centre III, where he was pronounced dead a few hours later.”
Two brothers have been arrested and inquiries continue.
Aswa River Region police spokesman, Jimmy Okema, said the suspects, one of whom is only 19-years-old, are currently being held at Lamwo central police station.