Aaron Donald submitted retirement letter to Rams during offseason

Aaron Donald seemed to have decided. 

The bits of gossip that drifted around the hour of Super Bowl 

Thus the specialist for the best cautious tackle to at any point

 a letter to the main group Donald's played for, the Rams,

them regarding his choice to resign, as indicated by a few

The letter, which has been an unreported mystery since 

it was sent, was on Competitors First letterhead and addressed to NFL Official