Wally the Green Monster Has a Little Sister - Boston Magazine
Red Sox Winter Weekend at Foxwoods!, by Rick Medeiros
Wally the Green Monster
Wally's Opening Day!, 03/20/2017
Boston Red Sox mascot gets a little sister - Sports Illustrated
Wally the Green Monster
About Tessie the Green Monster
Wally the Green Monster
Don't blame Chaim Bloom. It's ownership that did this to the Red Sox, and other thoughts - The Boston Globe
Wally's Clubhouse
37 Tessie The Green Monster Stock Photos, High-Res Pictures, and Images - Getty Images
Tessie (Boston Red Sox), SportsMascots Wikia
Wally's Clubhouse
Wally, Lenny Clarke star in new animated show – Boston Herald
Boston Red Sox introduce Wally's little sister, Tessie