Ryan Mundy fined $21,000 for hit on Darrius Heyward-Bey

Steelers safety Ryan Mundy is paying for the vicious hit he laid on Raiders receiver Darrius Heyward-Bey on Sunday. Mundy has been fined $21,000 for the hit, ESPN’s Adam Schefter reports. The collision between the crown of Mundy’s helmet and Heyward-Bey’s chin was violent, and it left Heyward-Bey motionless on the ground for several minutes.…