From Celtics to Warriors, who are X-Factors in Eastern, Western Conference finals of NBA playoffs?

We know the stars will have a say in the outcomes of the NBA’s conference finals.

Boston’s Jayson Tatum, Golden State’s Steph Curry, Dallas’ Luka Doncic and Miami’s Jimmy Butler are the focal points.

But who are the non-stars – the X-factors – who will make a difference in the conference finals?

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