Rookie Card Portland Sea Dogs - Boston Red Sox Baseball Card
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Red Sox promote infield prospect Christian Koss to Triple-A
How Red Sox prospect Marcelo Mayer made it to All-Star Futures Game
MLB Pipeline on X: Marcelo Mayer, MLB's No. 11 prospect, will
Marcelo Mayer out for remainder of 2023 with shoulder injury
Red Sox top prospect enjoying time in Portland
Trevor Story praised Red Sox prospect Marcelo Mayer
Red Sox Top prospect Marcelo Mayer may get called-up to Boston
Shortstop Marcelo Mayer makes debut at Hadlock Field in 6-2 Sea