"He's a great player, but Cassano isn't a champion yet," Marotta told Radio Anch'io Sport. "We give him all the blame - there's nothing else to say.
"We are looking at a player who is 25-years-old and Samp's gamble has really paid off, but Cassano needs to understand that even with our help his career could be tainted.
"All we can do is await the ban and call for a hefty fine. If he is banned for four games then he will lose 20 days' wages, which in Cassano's case is a tidy sum.
"Nonetheless, we can't just make repressive measures against a lad who is capable of delighting the fans.
"He has made mistakes, but so have so many of the games greats in the recent past."