Oxford United striker Dave Kitson has been charged with misconduct by the Football Association.
The charge is in relation to post-match comments made after the 1-0 loss against Bristol Rovers on 2 November.
Kitson called referee Mark Brown "horrific" and "horrendous" and also accused him of swearing at injured U's midfielder Alfie Potter.
He is charged with an alleged breach of FA rule E3 and the club have until 18:00 GMT on 12 November to respond.
The 33-year-old former Reading, Stoke and Sheffield United striker also called Brown "possibly the worst referee" he had come across in his 13-year career.
Brown awarded Rovers a penalty, while Potter also suffered a serious ankle injury in the League Two match.
Kitson is specifically charged with post-match comments which constitute improper conduct in that they called into question the integrity of a match official and/or implied the match referee was motivated by bias and/or were personal in nature and brought the game into disrepute.