Major League Soccer is expected to announce Tuesday or Wednesday that Union manager Peter Nowak must serve a one-game suspension for leaving the manager's box and entering the field of play during Saturday's 1-0 win over Chivas USA.
The Union improved to 2-3-1 with the victory.
Any coach who is ejected must serve a "one-game suspension in the club's next match in the corresponding competition," according to MLS disciplinary guidelines.
Nowak is expected to miss Saturday's home game against the San Jose Earthquakes.
He will be able to speak to the team before and after the game and at halftime, but cannot talk to players or coaches during the game.
Still undetermined are what - if any - additional penalties MLS will hand down to Nowak. The rules say suspensions and/or fines may be added "if the coach's actions are deemed to be egregious."
Nowak entered the field of play after defender Gabriel Farfan made a studs-up tackle on Chivas' James Riley. A bench-clearing scuffle ensued, and Nowak was on the field during the proceedings.
Midfielder Keon Daniel and Farfan picked up one-game suspensions after their red-card ejections on Saturday.
Attempts to reach Nowak for comment were unsuccessful.