As reported by Ken Rosenthal, the Mets are rumored to be exploring a trade deadline scenario where Noah Syndergaard is traded and the team negotiates an extension with Zack Wheeler.
Wheeler was previously considered the Mets’ top trade piece until shoulder fatigue put him on the injured list less than three weeks prior to the deadline. Though he is expected to make at least one start before the deadline, the injury scare combined with a middling season in terms of performance - Wheeler has a 4.69 ERA though his FIP is just 3.67 - has almost certainly sapped much of his value.
Syndergaard has also had an up and down season, but with two years of team control remaining and a more consistent history, he is likely to bring in a package of high-quality prospects.
The major concern with trading Syndergaard at this point would be the loss of three of the five main starters (with Wheeler and Jason Vargas leaving in free agency), but a Wheeler extension would partially resolve that issue.