Red Sox sign Jorge Alfaro to major league contract in catching shakeup

Red Sox's Jorge Alfaro has upward mobility clause, potentially complicating roster decisions

Red Sox fans unimpressed with decision to sign catcher Jorge Alfaro to major league contract

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Red Sox' Jorge Alfaro has unique clause in contract that could make him available to all other teams later this month – Blogging the Red Sox

MLB free agency: Non-Tender Candidates - MLB Daily Dish

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Jorge Alfaro signing shows Red Sox want competition at catcher position