(Video) Jaylen Brown talks staying mentally tough in the offseason

With the NBA offseason finally drawing to a close, attention turns to preseason - but how did the Boston Celtics stay sharp over the summer?

Jaylen Brown sits down with Celtics.com reporters Amanda Pflugrad and Marc D'Amico to discuss how he keeps his mind sharp when there's no NBA games to be played, as well as his trip to South Africa. Jaylen even gets a surprise visit early on, so check out the above video.

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Image, video: Boston Celtics
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