The Red Sox re-signed Keller to a minor-league contract Friday, Chris Henrique of Beyond The Monster reports.
Keller cleared waivers Thursday and elected to become a free agent.
The Red Sox designated Keller for assignment Tuesday, Pete Abraham of The Boston Globe reports.
The Red Sox selected Keller's contract from Triple-A Worcester on Monday, Chris Cotillo of MassLive.com reports.
The Red Sox re-signed Keller to a minor-league contract Tuesday, Chris Hatfield of SoxProspects.com reports.
The Red Sox released Keller on Tuesday, Alex Speier of The Boston Globe reports.
The Red Sox optioned Keller to Triple-A Worcester on Monday, Jen McCaffrey of The Athletic reports.
The Red Sox recalled Keller from Triple-A Worcester on Friday, Alex Speier of The Boston Globe reports.
The Red Sox optioned Keller to Triple-A Worcester on Monday, Chris Henrique of Beyond the Monster reports.
Keller signed a one-year contract with the Red Sox on Sunday, Mac Cerullo of the Boston Herald reports.