The Bleacher Creature was the official mascot for the Atlanta Braves Major League Baseball team during the late 1970s and early 1980s.
Coffey had worked as an usher during the 1977 Braves and Atlanta Falcons seasons at Atlanta–Fulton County Stadium and served as an assistant to Stensland.
Dennis appeared as the Bleacher Creature in various parades, schools, hospitals, little league events, mall openings, etc.
An introduction party was set up at a Braves home game, pre-event media was used to announce the change and special hats were given out to all fans attending.
[9][10] Coffey continued to fill the Bleacher Creature role until the mascot was retired at the close of the 1981 Braves season.
Coffey enjoyed being green as he was mentioned in many newspaper articles and press releases during his career with the Braves as being humorous, fun-loving and great with fans and kids alike.