A Chicago Fire news release issue today says:
"The Fire will be without the services of head coach Frank Klopas who was dismissed following Saturday’s match against Seattle Sounders FC. Additionally, defender Jalil Anibaba received a red card for his challenge in the seventh minute of second half stoppage time and will miss Friday’s encounter with Chivas USA."
In this usage, "dismissed" means disciplined rather than fired.
Here's some of what Sounders coach Sigi Schmid had to say about the incident:
"I know it was a little bit of a late tackle by [Jalil] Anibaba that he made on Leo Gonzalez. As the game was over and we were walking off the field my only concern was to get our whole team together, which we did. Eventually we got our whole team together and I just said, 'Let's stay here.' We talked a little bit. We went over to our fans at the end of that, gave [the Fire] a chance to get off the field. I didn't want the tempers to lead into the hallway to the locker room. I've seen that happen before in international play and other games."
Here's an explainer from the league:
"Red cards are not issued to coaches. Referees may, at their discretion, dismiss a coach or other team staff member from the sideline due to inappropriate behavior during a game. Any coach dismissed will serve an automatic one-game suspension in the club’s next match. A suspended coach may not be on the sideline during the game but may be in contact with team staff on the sideline and may speak to the team in the locker room beforehand, at halftime, and after the game. The Committee may add suspensions and/or fines if the coach’s actions are deemed to be egregious."