Tessie - Red Sox mascot

The origin story of Wally the Green Monster - The Athletic

Boston Red Sox mascots Wally and Tessie display the patch during a News Photo - Getty Images

Boston Red Sox mascots, Tessie the Green Monster and Wally the Green Nachrichtenfoto - Getty Images

Boston Red Sox mascot Tessie The Green Monster performs on the infield before a spring training baseball game against the Baltimore Orioles on Thursday, March 17, 2016, in Fort Myers, Fla. (AP

Watertown Resident Brings Red Sox Mascot Wally to Life in Animated Tale

Wally the Green Monster Has a Little Sister - Boston Magazine

Tessie - Red Sox mascot

Tessie - Red Sox mascot

BOSTON, MA - FEBRUARY 03: Boston Red Sox mascot, Tessie the Green Monster, tosses soft baseballs to fans while on a flatbed truck ahead of the spring training equipment truck as it departs on Boston Red Sox Truck Day on February 3, 2023, at Fenway

BOSTON, MA - FEBRUARY 03: Boston Red Sox mascots, Wally the Green Monster (left) and Tessie the Green Monster (right), pose for a photo in front of the spring training equipment truck

BOSTON, MA - FEBRUARY 03: Boston Red Sox mascots, Tessie the Green Monster (left) and Wally the Green Monster (right) pose for a photo during Boston Red Sox Truck Day on February