Dragons hooker Mitch Rein is likely to miss the trip to Newcastle for the season-ending clash with the Knights, as he faces a one-game ban for dangerous contact in the loss to Brisbane.

Rein is charged with grade-one dangerous contact with the kicker for collecting Ben Hunt.

It would mean St George Illawarra will rely on Shane Pumipi and Kyle Stanley as their dummy-half duo for Sunday's battle between former and current clubs.

The Broncos could be without inspirational back-rower Sam Thaiday for Friday's crunch NRL clash with Melbourne after he was charged with dangerous contact.

The Queensland and Test star was sanctioned for placing unnecessary pressure on the neck of St George Illawarra forward Will Matthews last Friday.

Brisbane need to win to ensure they secure a finals berth against a Storm side still holding out some hope of snaring a top four berth on Friday at AAMI Park.

Thaiday will miss a game with an early guilty plea, but the Broncos are almost certain to take their chances at the judiciary on Wednesday night, given that he will still only get one week if he fights the charge and loses.

Hard-hitting Penrith back-rower Adam Docker is also in danger of missing his side's important encounter with the Warriors on Sunday, a game the Panthers need to win to lock in a top-four spot.

Docker has been slugged with a grade-one dangerous throw on Manly's Jason King and will miss Sunday's game with a guilty plea.

South Sydney announced on Monday they will roll the dice with Issac Luke, risking losing the hooker for two matches after deciding to contest his dangerous contact charge.

Luke was cited for kicking out in Canterbury skipper Michael Ennis' tackle in last Thursday's 21-14 win over the Bulldogs.

He would have received a one-match ban if he took an early guilty plea but will be free to play against the Roosters at Allianz Stadium if the club's challenge is successful.

Halfback Adam Reynolds has pleaded guilty to his grade-one dangerous throw charge and will miss Thursday's game, which could potentially produce the winner of the minor premiership.

Canterbury forward Dale Finucane has pleaded guilty to a dangerous throw charge on Souths prop Jason Clark and will miss Sunday's match against the Gold Coast. - AAP