He doesn't have a NMC. Modified NTC only based on a scan of the current contract tracking sites.
And yes, if MM didn't report to play where he was assigned, he doesn't get paid, and for that time period he doesn't count against the cap either.
There's no real cap concern for a while. They're in a good spot, even with some LOL contracts on the books today. The stress year _could_ be after 17-18 when 15 and 23 are coming off their rookie deals. I could easily see a scenario where TM long terms them right there as franchise cornerstones, but lots can happen between now and then.
Regardless, cap space isn't a worry.