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[DallasMaverick]

If his D is near his brother's, I could see Nembhard starting at some point before Kyrie returns.  Some scouts said he plays bigger on defense and is a great POA defender.

That would be a super rare event.

Undrafted rookie point guard starting in his first season.

Generally only happens when there aren't any other options.

Think how difficult it is even for a highly-regarded point guard who's a high draft pick to get much playing time as a rookie.