Javier Báez - Wikipedia
Veteran Catcher Exercises Opt-Out Clause In Red Sox Contract
Ex-Red Sox Slugger Latches On With New Team After Electing Free Agency - Sports Illustrated Inside The Red Sox
Red Sox roster: Jorge Alfaro exercises opt-out; team has 48 hours to decide
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Red Sox agree to minor-league deal with catcher Jorge Alfaro – Blogging the Red Sox
Jorge Alfaro signing shows Red Sox want competition at catcher position
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
New Red Sox catcher Jorge Alfaro wins Dominican Winter League Finals MVP