FYI.... Pro Sport recently received a healthy update. It's current at the moment, and working great. If you navigate the Archive section in Pro Sport, you'll find HD links for the first two weeks of NFL games. It will work for this week's live NFL games as well.
Sportsdevil was also updated recently. It seems that Castaway has been abandoned and Sportsdevil has been resuscitated. Newest version of Sportsdevil can be found in the first post here:
https://forums.tvaddons.ag/sportsdev...o-librtmp.html
Sportsdevil is stand alone now, and will not auto update like Pro Sport, so you'll have to go to the above address, download the zip file(don't unzip it!), and add the zip file in KODI.
EDIT: Pro Sport current version is v0.55. If you are not at that version, launch Fusion Addon Installer, navigate repositories, and install PodGod repo. Install Pro Sport Video Addon from PodGod repo.