Defenseman Robert Bortuzzo is sidelined due to an undisclosed injury and will not be a go for the start of training camp, head coach Dan Bylsma said this morning.  Bortuzzo one of the Penguins top defenseman prospects in their system, was injured in the Penguins rookie tournament this week. It is unknown for how long his rehab period will be. Also sidelined for the start of camp is 25 year old defenseman Boris Valabik. He is rehabbing a knee injury according to Bylsma. The big 6-foot-7 defenseman was signed to a two-way deal this off-season.