MLB TV through Playon stutters during streaming of live games only

Watching live MLB games on the WD TV Live through the Playon media server stutter during the live portion of the game. Commercials during the game and previous days games do not show the same problem. The problem remains no matter what display setting is used.  Is there a solution to this problem?

Configuration

WD TV Live connected directly to router. HDMI connection to TV.

Playon running on Windows 7 64 bit OS computer