MLB trade rumors: New York Mets exploring blockbuster move for $116.5 million Arizona Diamondbacks star following Jeff McNeil exit

The New York Mets opened up a real hole in their infield when they moved Jeff McNeil, and around the league, one name keeps coming up as the possible next step: Ketel Marte. According to MLB insider Francys Romero, New York’s interest in the Diamondbacks infielder ramped up almost immediately after the McNeil trade was completed.This wouldn’t be a small tweak. Landing Marte would dramatically change how the Mets’ infield looks and sends a clear message about their mindset. It would be a move aimed squarely at winning now, not down the road.On December 21, 2025, the Mets traded Jeff McNeil to the Athletics. They included $5.75 million in cash and received minor-league pitcher Yordan Rodríguez. The move removed McNeil’s $15.75 million salary from the 2026 payroll and eliminated a $15.75 million club option for 2027.McNeil was still a useful player, but he no longer fit the team’s direction. Trading him cleared salary and gave the Mets more flexibility in the infield.Arizona is not shopping Marte, but teams know the Diamondbacks will listen if the return fits their long-term plans. Pitching is the priority.A realistic offer from the Mets would likely include:• One top pitching prospect such as Brandon Sproat or Jonah Tong• Infielder Brett Baty as a controllable position player• Reliever Huascar Brazobán to add immediate bullpen depth Ketel Marte is under contract through at least 2030. He will earn $16 million in 2026, with salaries rising to $22 million later in the deal, plus a player option for 2031. Any team acquiring him takes on the full contract.For the New York Mets, Ketel Marte brings a middle-of-the-order bat and defensive flexibility. He fits cleanly alongside Francisco Lindor and Juan Soto and can handle multiple positions if needed.For the Diamondbacks, the appeal is timing. Ketel Marte is entering his age-32 season. Moving him now could return young pitching that better lines up with their next competitive window, while also easing long-term payroll pressure.Ketel Marte provided more power and reached base at a higher rate. McNeil continued to make contact, but the overall impact gap was clear.New York Mets positives:• Clear upgrade in the lineup• Contract certainty compared to free agency• Fits the current roster without major positional issuesMets risks:• Age-related decline over the life of the deal• High prospect cost• Long-term salary commitmentArizona Diamondbacks positives:• Young pitching depth• Payroll flexibility• Roster reset around a younger coreDiamondbacks risks:• Loss of a proven All-Star• Short-term offensive drop• Clubhouse impactIf the New York Mets complete this move, it would be a direct bet on the present. Marte gives them a stronger bat and more flexibility without entering the open market. Arizona would gain young pitching and financial room but give up one of its most reliable players.Also read: MLB trade rumors: New York Yankees could pivot towards $80 million Chicago Cubs hard-hitter after missing out on Kyle TuckerNothing is done yet, but the direction is clear. The Mets are looking to make a major change, and Ketel Marte sits at the center of it.