The San Jose Sharks have just had their worst fears confirmed.
Earlier this week is was revealed that Thornton had suffered damage to the MCL in his right knee and, while the Sharks initially set a possible return for just two weeks, there was concern he could be out for an extended period of time.
Now Curtis Pashelka has revealed that general manager Doug Wilson has informed him that Thornton did in fact need surgery and has now been ruled out indefinitely as a result of that procedure.
There is no timetable whatsoever for his return, although we are able to share that it was a arthroscopic procedure that took place late in the afternoon on Thursday.
A huge blow to the Sharks, and one that is likely to have a drastic impact on how they will behave at the trade deadline.