There is no one-for-one replacement for Zack Wheeler on the market, at least that the Mets can afford. They aren’t likely to dole out big money to keep Wheeler or replace him with Gerrit Cole or Stephen Strasburg.
That means the Mets are going to look at more realistic options if any at all. GM Brodie Van Wagenen has already stated that he is happy with the depth on the team and that Seth Lugo and Robert Gsellman could move back to the starting rotation.