Great Baseball Nicknames:’ The Toy Cannon’- Jimmy Wynn. Yesterday would have been Jimmy Wynn’s 79th birthday. He was one of the most underrated players of his era. He played a good chunk of his career with a bad team- the Houston Astros- in a cavernous baseball park-The Astrodome- the worst hitters park in the league. Despite his small size 5’9″ 160- he had a lot of pop in his bat which earned him the nickname “The Toy Cannon.” A three- time all-star-The Toy Cannon played from 1963-77 and hit 291 home runs, 964 RBI’s and had a .250 average. He also had great speed stealing 225 bases in his career. Jimmy Wynn died last March at the age of 78.