The inclusion of Montreal Impact for the 2012 season means all clubs will be open to losing one or two players when the Canadian outfit make their selections as they put together a squad for their debut season in North America's top flight.
"It's something that obviously we knew was coming," he said.
"We went through it last year. I think when you're a quality team there's always a chance that you're going to lose somebody. Unfortunately, the way the rules are, you can't protect everybody.
"Sometimes you've got to leave somebody out there that you really don't want to leave out there.
"Hopefully we don't lose anybody. We'll see, but those decisions we'll make at the time we have to."