TMZ Sports: Cam Newton -- The Greatest Meat-Free QB

Cam Newton's toughest battle this week might be dinner ... 'cause this is his first Thanksgiving eating nothing but fish! Why did he go pescetarian, and -- since Cam's having a great season -- should more QBs follow suit?

Plus, Alabama QB AJ McCarron is worried Auburn fans might get rough with his hot model GF Katherine Webb at this weekend's Iron Bowl. Shouldn't she just stay home?

And ... former NFL star Tiki Barber joined us to break down his awesome new biz -- pimping out superstar athletes for birthday parties, speaking engagements, even bar mitzvahs!