San Diegans Marcelo Mayer, Spencer Jones focus on the present as they head to MLB Futures Games - The San Diego Union-Tribune
Marcelo Mayer 2021 Bowman Draft Chrome DP Auto - Refractor #CDA-MM Price Guide - Sports Card Investor
Shortstop Marcelo Mayer makes debut at Hadlock Field in 6-2 Sea Dogs win
Red Sox prospect Marcelo Mayer's custom cleats at Futures Game - ESPN
Sports Digest: Red Sox shut down Marcelo Mayer for remainder of Sea Dogs season
2023 Topps BOWMAN MODERN PROSPECTS - MP-19 Marcelo Mayer - Boston Red Sox
Yankees' Anthony Volpe, Red Sox' Marcelo Mayer headline 2023 MLB top SS prospects
Boston Red Sox top prospects 2023: Marcelo Mayer leads list
Marcelo Mayer - Wikipedia
Marcelo Mayer's 11th home run, 06/22/2023
Marcelo Mayer's three-hit game, 06/04/2023
Marcelo Mayer (b. 2002) News — College Baseball, MLB Draft, Prospects - Baseball America
Red Sox Q&A with Keith Law: Marcelo Mayer, Miguel Bleis and more prospects - The Athletic