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No one knows for sure when Rob Gronkowski will return to the field, but know this: He will be back.

The New England Patriots tight end said as much Tuesday night when he posted a video giving an update on his knee injury. The Patriots and the Gronkowski family came together to release a statement saying the same earlier in the day, too.

But if you need any more convincing that Gronkowski would indeed be back, look no further than his Facebook page where he channeled the Terminator.

We can't help but wonder if Tom Brady is starting to share his Facebook guy with the rest of the team. Perhaps the greatest part of this, though, is picturing Gronkowski sitting around his house saying "I'll be back" over and over and over again.