I considered making this the "4x4th edition," creating a puzzle that had 16 images instead of 9, but that will take a little more time. In the meantime, I'll stick with the merely mortal 3x3 version.
Scroll down this page to see the other Pic-Tac-Toes. As always, your mission is to determine the 8 themes, each of which unites a line of images: 3 rows, 3 columns, 2 diagonals.
SOLVED! Fresh from vacation, K-Lyn of And She Was... dominated early, with 5 of 8 themes solved correctly. Then Bill of Shakespeare Teacher got the last 3, but was particularly frustrated by the left column. I apologize. Sort of.
P.S. This is by no means an endorsement of any pro football team.