Gaston was signed by the Braves in 1964 and spent 5 seasons playing in their minor-league system. His only big-league experience with the Braves was 9 games in September 1967.


Cito was the Padres' last (30th) pick in the October 1968 expansion draft. His minor-league days were now behind him, as Gaston made the Padres at the start of the season, and took over the starting center field job from Tony Gonzalez in game #4.
Cito's best season was 1970, when he hit 29 homeruns, batted .318, and was named to the all-star team. He was the team's regular center fielder for 3 seasons, then slid over to right field for 1972 and 1973. His final season with the Padres was 1974, which he spent as a pinch-hitter and part-time right fielder.
In November 1974 Cito was traded back to the Braves for pitcher Danny Frisella. He spent his last 4 seasons ('75-'78) as a pinch-hitter and outfield backup for Atlanta. On September 22, 1978 he was sold to the Pirates, and played 2 games for them before retiring after the season.
Gaston had greater success as a manager, piloting the Toronto Blue Jays from 1989 to 1997, and again from 2008 to 2010. His team finished in 1st place 5 times, including World Series championships in 1992 and 1993.