Featherstone Lions' Brendon Gibbins has been hit with a 12-match ban by the RFL disciplinary panel.
The forward pleaded guilty to a Grade F Striking charge at an Independent Operational Rules Tribunal on Tuesday evening.
It means that he will miss this weekend's fourth-round Challenge Cup clash against Betfred League 1 side Doncaster.
Teammate Danny Glassell will also miss the fixture after being hit with a five-match ban for Grade D striking.
The charges relate to an incident during Featherstone's 20-10 win over York Acorn in the third-round earlier this month.
Featherstone Lions' tie against Doncaster this Sunday will be played at the LD Nutritition Stadium, the home of Championship neighbours Featherstone Rovers.
The Lions lost 28-10 at Milford last weekend while Doncaster had no game.