Josh McRoberts: Will sit out preseason opener

It’s uncertain if McRoberts tweaked something in the Mavs’ initial practices
during training camp or if the team is just erring on the side of caution by
keeping the big man — who has a checkered injury history — on the sideline
Monday. Whatever the case may be, McRoberts will likely have to get back on the
court at some point during the preseason to stake a claim to a rotation spot in
the Mavs’ frontcourt.