The most intriguing name is Cincinnati Reds ace Luis Castillo. But with the Reds trying to compete, it might be more likely for them to deal Castillo after the 2022 season -- when he'll have just one year of team control left.
And as it pertains to Castillo, the cost it would take to acquire him now might not interest the Mets anyway -- not with them understandably reluctant to deal top prospects.
Trading for Castillo's teammate, Sonny Gray, might cost a bit less. But he's on a relatively team-friendly deal (he'll earn $10.2 million in 2022, with Cincinnati holding a $12 million club option for 2023).
For the Mets, who could dangle players such as J.D. Davis, Jeff McNeil, and/or Dominic Smith, the best trade partner could possibly be the Oakland Athletics, who are in fire sale mode and open to trading Sean Manaea, Chris Bassitt, and Frankie Montas.
Verdict
The Mets need to add a starter who will likely eat a lot of innings and who can ideally do so while pitching in the middle of their rotation.
That would eliminate Rodon due to his injury issues, and eliminate other intriguing but high-risk options on the free agent market like Clayton Kershaw.
Someone like Manaea could be a perfect fit, and it's likely that he'll cost less to acquire than Bassitt (who received Cy Young votes the last two seasons) and Montas (who is under team control through 2023).