What happened: The Tampa Bay Rays exercised their $3.1 million club option on shortstop Taylor Walls on Monday. The decision keeps the infielder under contract following his defensive campaign.

Why it matters: Picking up the option secures Tampa Bay's everyday shortstop without sending him into arbitration. Walls anchored the middle infield throughout the Rays' run to the American League pennant.

What to watch: Tampa Bay continues to finalize its 40-man roster ahead of offseason contract deadlines.