Thanks to a 30 percent loading and 78 carryover points on top of his level one rough conduct charge, Johnson faced the prospect of a two-match suspension had he unsuccessfully challenged at the tribunal for his bump on Grundy's team-mate Daniel Hannebery last Saturday at Simonds Stadium.
But the Cats decided against rolling the dice at the tribunal on Tuesday night, hoping they can get past the Dockers at the MCG on Saturday night and regain Johnson for the trip to play either Adelaide or Sydney that would follow if they do win.
Grundy, meanwhile, does not risk any extra time on the sidelines for his crude strike to the head of James Podsiadly after his clean record over the past five years allowed his potential penalty to be cut in half.
An early guilty plea would have meant only 26.56 carryover points but the Swans will be hoping to have the charge either thrown out or downgraded in order to have him available for Saturday's AAMI Stadium clash with the Crows.
Brown would have been staring down the barrel of an eight-match suspension if he had taken on his charge following his crude bump on Riley at AAMI Stadium last Saturday.
St Kilda's Leigh Montagna will also head to the tribunal, on Tuesday September 11, as an early guilty plea for his rough conduct offence against Carlton's Andrew Walker would not have been enough to save him from a one-game ban.
Greater Western Sydney veteran James McDonald was outed for one match for engaging in rough conduct against North Melbourne's Jamie McMillan while another Giant, Curtley Hampton, copped a reprimand and 60 carryover points for tripping Kangaroo Ryan Bastinac.
Johnson's team-mate Paul Chapman accepted a reprimand and 60 carryover points for striking Swan Ben McGlynn while there were also wrestling fines for Blues Andrew Walker ($900) and Mitch Robinson ($3000) as well as Saints Stephen Milne ($900) and Tom Simpkin ($900).And North Melbourne pair Jack Ziebell and Cruize Garlett (both $1950), Gold Coast's Trent McKenzie ($900) and Brisbane's Amon Buchanan ($900) have all accepted fines for making negligent contact with umpires.