Just when this year wouldn’t get any more interesting for FC Dallas, MLS reporter Paul Tenorio dropped this bomb on Twitter.

Have some major MLS news that could impact the playoff race. It's a doozy. This is going to be a few tweets, guys. (Where's my 280?!) (1/5) — Paul Tenorio (@PaulTenorio) October 2, 2017

Okay we’re listening....

Per FIFA rules, once a team lineup sheet is given to referees, if a player is changed out of the lineup he is ineligible for that game.(2/5) — Paul Tenorio (@PaulTenorio) October 2, 2017

So what’s the big deal?

On Saturday, FC Dallas swapped Tesho Akindele into starting XI for Michael Barrios. Barrios then subbed into the game in the 84th min (3/5) pic.twitter.com/nqHrU4QOoK — Paul Tenorio (@PaulTenorio) October 2, 2017

Oh crap....

Per FIFA rules, the match should be forfeited, which would drop FCD to 41 pts and pull Orlando City to 41 pts, just 2 behind RBNY (4/5) — Paul Tenorio (@PaulTenorio) October 2, 2017

Well....that doesn’t sound good to us.

I am told the league is aware of the violation and looking into it. No update yet as to what will occur. Plenty at stake, obviously. (5/5) — Paul Tenorio (@PaulTenorio) October 2, 2017

Yeah...plenty at stake indeed.

Naturally this could be a big blow to FC Dallas’ post season chances. Here are a couple things that could have easily happened here:

1. The wrong lineup sheet was submitted and then corrected at the last minute.

This actually happens a fair amount at MLS games, not often enough to draw attention but enough that you know mistakes happen and no one loses points over.

2. The officials knew about the last minute change and accepted it.

To me this would fall on PRO, not FCD.

So we’ll see what happens to this story. Once we get word from the league and/or FCD we’ll pass it along to you all as soon as we can.