UPDATE: Wally the Green Monster has been found - NBC Sports
Wally's Clubhouse
Wally the Green Monster - Wikipedia
Police: Wally the Green Monster found
The origin story of Wally the Green Monster - The Athletic
When Wally the Red Sox Mascot Vanished From Boston's Fenway Park
List of Major League Baseball mascots - Wikipedia
Red Sox mascot Wally briefly lost, then found - The Boston Globe
Wally the Green Monster
Wally's Opening Day' Rekindles New Spring Tradition For Red Sox
Wally the Green Monster through the years
Wally's Clubhouse
Red sox wally hi-res stock photography and images - Alamy