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Buster Posey hopes to get an evaluation in 2026 on recent SF Giants trade acquisition

Interesting…
Jun 24, 2026; Denver, Colorado, USA; Boston Red Sox short stop Marcelo Mayer (11) doubles in fifth inning against the Colorado Rockies at Coors Field. Mandatory Credit: Ron Chenoy-Imagn Images
Jun 24, 2026; Denver, Colorado, USA; Boston Red Sox short stop Marcelo Mayer (11) doubles in fifth inning against the Colorado Rockies at Coors Field. Mandatory Credit: Ron Chenoy-Imagn Images | IMAGN IMAGES via Reuters Connect

The SF Giants swung a trade with the Boston Red Sox for former top prospect Marcelo Mayer. Buster Posey hopes to get an evaluation on him before the end of the year.

On Thursday, Posey joined the Murph and Markus Show to discuss the trade deadline. He was asked about what the plans are at second base and volunteered Mayer as an option:

“With trading for Marcelo Mayer from the Red Sox, pending his health and getting back out onto the field, looking to get an eval on him.”

Posey went on to describe Mayer as an “interesting and exciting type of player.” He also indicated that the young infielder should benefit from a change of scenery.

If healthy, Marcelo Mayer would have a clear path to playing time with the SF Giants

One source close to the Red Sox felt that they gave up on Mayer too soon. He had been hampered by injuries during his brief time in a Red Sox uniform.

When the Giants swung the deal, Mayer had been on the injured list. He had been out since the end of June with a forearm injury. He had been cleared to begin a hitting progression at the end of July, per Tim Healy of The Boston Globe. Usually, a rehab assignment is the next step.

The Giants shipped reliever Erik Miller and outfield prospect Carlos Gutierrez as part of the deal to acquire Mayer. Not that long ago, Mayer was viewed as one of the top prospects in baseball, ranking as high as No. 9 before the 2023 season according to MLB Pipeline.

Despite only being 23, that prospect status has quickly faded. Mayer struggled to a .625 OPS across 364 injured-plagued plate appearances with Boston.

The left-handed bat possesses quality raw power but he does not quite leverage all of it in games. He has shown improvement in his approach, but there is still work to be done to curb his chase tendencies.

If he can make it back to the field, there should be a path to playing time at second base and third base. Playing time at second base is wide open now that Luis Arráez has been traded and Casey Schmitt is likely out for the year following a knee injury. Plus, Matt Chapman is not yet ready to return to the field.

Nate Furman and Christian Koss have handled infield duties since the trade deadline. Presumably. Mayer would assume a larger share of the playing time at second base or third base if he can return to the field.

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