Surely.

Please do convey with him, perhaps through writing? that many are praying for him.
I think it unfair that churches ask the lead minister to do everything. God called them to be one person...and usually with one main calling (be that preaching or pastoring as primary.) When this occurs, they are without a leader anyway, so it would have been best to hire the assistant to do the tasks necessary beyond the scope of the leader.
TC of yourself Candybear, don't feel at a loss, he will sense your prayers.