This season is about changing the team, not winning. Let a bunch of "what the heck, give'm a chance" players have their day in the sun. At best, Faveroni looks to be a backup center at best. Great!
Such players are not easy to find, so if ainge can get one now it saves trouble later.
I see no problem with bringing him into camp to see what he can do. If he better than iversion or melo, so much the better. If not, they cut him.