I was somewhat surprised to read this account (see link, below) of Rodgers having recent knee surgery. He kept that injury pretty well under wraps. Also, the linked story said he had ACL surgery while at Cal. Don't recall that either. Must be a predilection toward blocking out memories of bad news.
http://my.xfinity.com/articles/sports-general/20160130/FBN--Packers-Rodgers.Surgery/
http://my.xfinity.com/articles/sports-general/20160130/FBN--Packers-Rodgers.Surgery/