Glenda Ellis first played organised softball in the 1976 Belize City Senior Female competition for the historic and popular Guinness Softball team that ruled local softball in the city from 1975-1978.
During that time, she also played in the annual Secondary Schools Softball competition, for the then Belize Junior Secondary School No. 1 (today’s Edward P. Yorke High School) and the then Belize Technical College.
She was first named to the National Women’s Softball Team of Belize at age 15, when the Belize Amateur Softball Association, entertained Michigan State University Softball Team. In July of that year she travelled with the team to Medellin, Colombia, where she participated in the 13th Central American and Caribbean Games. Later that year, she was on the team that represented Belize at the fourth Women’s World Series in San Salvador, El Salvador.
In 1979, Glenda represented Belize at the first International Juvenile Tournament for players under 21 years and was a rewarded with the gold medal. Two weeks later, she was off to the biggest multi-sports games in the hemisphere, the VII Pan American Games that were held in San Juan, Puerto Rico. The Belize team defeated the World Champions United States of America and won a Bronze Medal. Four years later, she represented Belize at the VIII Pan American Games in Caracas, Venezuela, and she was numbered among the team members that won its second Bronze Medal at the games.
Her brilliant career was cut short as a result of a foot injury and became a recurring issue.