Astros' Will Smith, Trey Mancini become free agents
Report: Astros, reliever Rafael Montero agree to three-year, $34.5M contract
Justin Verlander declines Houston Astros option, becomes free agent
Verlander declines $25M Astros option, becomes free agent
Verlander declines $25M Astros option, set to join loaded free agent class
Justin Verlander declines $25M Astros option, becomes free agent
Verlander declines $25M Astros option, becomes free agent
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