The Red Sox have introduced a new mascot ahead of spring training – Wally the Green Monster’s little sister, Tessie.

The Red Sox released a video on their website to introduce Tessie, who is named after the Dropkick Murphys song and longtime anthem of the team.

Tessie lives in the Green Monster at the Red Sox spring training facility in Fort Myers, Florida. It is unclear yet if she will have an everyday role with the Red Sox.

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