Boom recruit Zac Williams is set to miss Carlton's round-one showdown with AFL premiers Richmond after being offered a one-match suspension for rough conduct.
Williams, lured from GWS through free agency at the end of last year in a boost to the Blues' rebuild, jumped off the ground and caught St Kilda's Hunter Clark with a high bump during last Thursday night's practice match.
The hit left Clark dazed, however, he played out the match and later passed a test for delayed concussion.
The AFL match review officer graded the incident as careless conduct, medium impact and high contact.
Williams, who played 113 games in eight years with the Giants, has the option of challenging the ban.
But he will otherwise have to wait until round two to make his Carlton debut against Collingwood.
The suspension is a blow to the Blues' chances of upsetting Richmond, who they have not beaten in their past 10 meetings, dating back to 2013.
Aside from the hit on Clark, which occurred during the opening seconds, Williams had a positive impact for Carlton in the pre-season fixture alongside fellow recruits Adam Saad and Lachie Fogarty.
Williams racked up 17 disposals, six tackles, six clearances and two goals in a predominantly midfield role with stints in attack.
"When we needed someone to stand up around the contest and be tough, I thought his ability to win the ball and use it and get it going our way was very good," Carlton coach David Teague said.
"He plays a role in the forward half, as well, and he kicked a couple from forward-50 stoppages, which was exciting.
"We've loved having him and Adam (Saad) and Fogs (Fogarty), as well, they've been great inclusions."
Meanwhile, GWS captain Stephen Coniglio and Fremantle's Darcy Tucker can both accept $2000 fines for low-impact rough conduct charges out of the weekend's pre-season matches.
Port Adelaide's Karl Amon can accept a $1000 fine for careless contact with an umpire.
West Coast's Jeremy McGovern was cleared of wrongdoing over his shirt-front on Fremantle's Lachie Schultz.
Australian Associated Press