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Red Sox prospects Marcelo Mayer, Triston Casas crack ESPN’s Top 50 list

The Red Sox came into the 2021 season with one of the 10 least-favorable minor league rankings in the league, despite some room for hope with Triston Casas, Jeter Downs, Jarren Duran, and Bobby Dalbec in their farm system.

All signs point to those rankings changing a bit when 2022 rolls around.

A new list from ESPN MLB insider Kiley McDaniel has Boston boasting two of the league’s top 50 prospects in shortstop Marcelo Mayer and the first baseman Casas.

Mayer, the No. 4 overall pick in the 2021 MLB Draft, debuts on the list at No.