Simply put, Shelden is not that good a player. He has his moments but to start for this team, even for one night, is just not a good notion. And....I'm being kind.
Shelden has a bad set of hands, is not a very good defensive player in this system, isn't a very good passer and is limited offensively. He is good for the role he plays which is the 5th big man role.
Tonight he will probably be called upon to give this team some minutes. I expect him, like he has for most of this year, to play his role and play it well. He'll rebound, he'll be a garbage man underneath and when teams double off him he'll get the ball for easy baskets.
That's what he does and it's what he does usually against second teamers for the most part.Starting, not a good idea.