Because its Keane's second red card of the season, and extra 1 game will be added to the 3 given for the offence, and this time nobody can appeal to the FA.
Keane's suspension will put even more pressure on Alan Knill's miniscule squad, he will miss the home game's against Nottingham Forest (21/1) and Hartlepool on 4th Feb and the away games against Bournmouth this Saturday and Gillingham on 28th.