Yeah I am sure its the dryer's fault.
All kidding aside, I experienced the same thing at the end of the season. For all the winter weather games I wore cold gear under armor, regular under armor, a red hoodie that had a thermal lining, and my Fletcher jersey. After every game I washed all my stuff and it all came out fine. After the Pats game the jersey and both sets of the under armor were fine. The hoodie however had shrunk so it didn't fit anymore. Of course it was from Steve and Barrys which had just closed. So now when the cold weather approaches I will keep my eyes peeled for a blue or red hoodie that has a thermal lining. It was a key component of staying warm during December and MNF.