Sorry to make so many threads...
HM2 will randomly decide to not display stats on certain players. It does this in game and in the replayer.
When I opened up the replayer to take a screenshot, it actually did it for all the players.
I closed and re-opened the replayer. And it only did it for one player, but even after completely closing and restarting HM2 this players stats will not show in game or in the replayer. I have a few hundred hands on him.
It does this with several players. It seems to be random.