According to ProFootballTalk.com, an MRI has confirmed that Patriots tight end Rob Gronkowski has suffered a torn ACL.
MRI confirms torn ACL for Rob Gronkowski, per league source.
— ProFootballTalk (@ProFootballTalk) December 9, 2013
This will once again set the Patriots offense back.
Update: Gronk also tore his MCL.
Tests today confirmed a torn ACL and MCL for Patriots TE Rob Gronkowski.
— Albert Breer (@AlbertBreer) December 9, 2013