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Brandon Sproat has adopted a new mentality on the mound, is throwing gas past hitters and might have solved his Triple-A issues.

Nolan McLean never developed those Triple-A issues, now is 11 games into his tenure with Syracuse and has been piling up the strikeouts without apparent notice that his competition level has been raised.

Two of the Mets’ best pitching prospects and their two closest to Queens look arguably ready — at a time when the Mets’ big-league rotation no longer has a clear hole.

The timing has not been perfect, with the club wanting Sproat and McLean to conquer Syracuse first and resistant to a promotion (and an addition to the 40-man roster) for a spot-start.