Minor Notes: Mayer earns promotion to Portland - SoxProspects News
Marcelo Mayer among three Red Sox prospects named to roster for All-Star Futures Game - The Boston Globe
Red Sox promote infield prospect Brainer Bonaci to Double-A Portland – Blogging the Red Sox
Boston Red Sox minor league players - Wikipedia
Red Sox's Alex Cora Addresses Marcelo Mayer's Promotion To Double-A
How did Red Sox prospects Marcelo Mayer, Nick Yorke, and Luis Guerrero fare in All-Star Futures Game? – Blogging the Red Sox
Red Sox Prospect Marcelo Mayer Placed On Injured List In Double-A
Marcelo Mayer: News, Stats, Bio, & More - NBC Sports - NBC Sports
Red Sox promoting No. 1 prospect Marcelo Mayer to Double-A
Red Sox Rumors: Easy free agent target, Marcelo Mayer mashing, Tanner Houck shuffle