knee, a source told ESPN NFL Insider Adam Schefter.
[+] EnlargeRob Gronkowski
AP Photo/Steven SenneRob Gronkowski was carted off the field after suffering an injury to his knee against Cleveland.
Gronkowski, who suffered the injury in Sunday's wild 27-26 win over the Cleveland Browns, will undergo an MRI on Monday, according to the source.
FoxSports earlier reported that the Patriots believed it was a torn ACL.
Patriots coach Bill Belichick revealed after the game that Gronkowski was taken to a hospital for evaluation, but said he didn't know any more. We should know more on Monday but it looks like fantasy owners won't have Gronk for the rest of this season. Look for Julian Edelman and Shane Vereen to pick up more targets.