The club admitted a breach of FA Rule E21 (a) after a clash between Matt Sparrow and Darren Sheridan spilled into a brawl between the two sides.
The club were warned about their future conduct and ordered to pay costs
Second Division Oldham denied the same charge, but the allegation was proved but they were also warned about their future conduct and ordered to pay the costs of the hearing.
Darren Sheridan, who sparked the brawl by punching Matt Sparrow, was also warned over his improper conduct - but escaped a fine as he had been fined £1,600 by his club.