Nash Rawiller will miss the Group One Randwick Guineas meeting and possibly the ride on star colt Pierro after being suspended for careless riding at Newcastle.

The top jockey was outed for five meetings for shifting in aboard Ivanhoe in the third race when not clear of Jay Ford's mount Entirely Platinum.

His penalty will begin after he rides at Warwick Farm on Saturday when his mounts include Laser Hawk in the Group One Chipping Norton Stakes.

He can resume on March 17, a day after the Randwick Guineas.

The Group One race has been among the possible options for Pierro's next start although trainer Gai Waterhouse is yet to confirm his autumn program.

The colt resumed with a brave victory in last Saturday's Hobartville Stakes with Rawiller in the saddle.