Red Sox top prospect Marcelo Mayer promoted to Double-A - CBS Boston
2021 MLB Draft: Red Sox first-round pick Marcelo Mayer quickly ditches Yankees allegiance
Portland McClelland Miscellanea
Prospect Report: Encarnacion-Strand Hits First MLB Home Run — College Baseball, MLB Draft, Prospects - Baseball America
Shortstop Marcelo Mayer makes debut at Hadlock Field in 6-2 Sea Dogs win
SoxProspects News: Minor Notes: Mayer earns promotion to Portland
Red Sox prospect Ceddanne Rafaela heating up at Double-A Portland
SoxProspects News: Minor Notes: Mayer shut down; Meidroth and Troye shine for Portland
How did Red Sox prospects Marcelo Mayer, Nick Yorke, and Luis Guerrero fare in All-Star Futures Game? – Blogging the Red Sox
A longtime Merrimack Valley resident, Sea Dogs manager Epperson enjoying life close to home, Sports
Red Sox No. 1 Prospect Marcelo Mayer Promoted to Portland
A cluster of talent at Double A Portland bodes well for the Red Sox' future - The Boston Globe