Syracuse coach Jim Boeheim, who is an assistant on Team USA, said Thursday that he was "99 percent sure" that Rautins, a junior, had torn his ACL.
Rautins played two minutes for Team Canada on Thursday night. His father, Leo, is the head coach.
"It's too bad, he worked so hard this summer, it's really devastating for him," said Boeheim by phone from Las Vegas, where the U.S. was preparing to play the U.S. Virgin Islands in pool play Thursday night.
"The good news is that he hasn't redshirted yet," Boeheim said. "It's usually six to nine months (of a recovery) so the timing is there for him to be perfectly healthy for [2008-09]."
Boeheim said the Orange will miss Rautins' 3-point shooting. Rautins made 67 of 166 3-point attempts last season for the Orange, who played in the NIT after missing the NCAA Tournament.
"We're going to be OK but his shooting is hard to replace, he's such a great shooter," Boeheim said.
Andy Katz is a senior writer for ESPN.com.