Troy Polamalu not fined for hit on Wes Welker

The NFL is cracking down this season on hits to the head and neck area of defenseless receivers, but the vicious hit that Steelers safety Troy Polamalu unleashed on Patriots receiver Wes Welker on Sunday apparently didn’t qualify. Polamalu was not fined for his hit on Welker, the Boston Herald reports. Welker suffered a neck…