ESPN's Adam Schefter was the first to report the news of Gronkowski missing the beginning of the workouts.
Schefter adds Gronkowski is still considering whether to play in the upcoming National Football League season, but has had "good communication" with New England.
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Per Schefter, Gronkowski is still considering whether to play in 2018.
This has pushed the Patriots into a hard situation where the organization has had to continue to wait on their star tight end to make a decision.
The source, however, indicated there has been communication with the Patriots and Gronkowski's camp recently.
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Gronk has still not committed to playing this season. It's unclear if Gronkowski was one of them. The Patriots star has a $250,000 workout bonus that's based on attending a "percentage" of the voluntary workouts. It's possible he's simply thinking about moving on after eight seasons and plenty of injuries and surgeries.
When the Patriots begin offseason work Monday, Gronk and Tom Brady will not be there.
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