Castleford prop Liam Watts has had a one-match ban doubled after his appeal was described as “frivolous”.
The former Hull forward entered a guilty plea when he appeared in front of an independent operational rules tribunal on Tuesday evening but challenged the grading.
However, the tribunal found the grading to be correct and, after deciding his challenge was frivolous, doubled the suspension and fined the player £500.
Catalans Dragons front rower Gil Dudson was also unsuccessful in challenging the grading which resulted in a one-match ban for a dangerous tackle in Friday’s cup-tie with Warrington.
The tribunal decided his appeal was not frivolous and so the one-match ban remains but he was fined £500.
Warrington second-rower Jack Hughes accepted a one-match penalty notice for a Grade B dangerous tackle during the same game.