Sherrard Alexander Robertson (January 1, 1919 – October 23, 1970) was a Canadian-American outfielder, second baseman, front office executive and coach in Major League Baseball. The 6 ft (1.8 m), 180 lb (82 kg) (12 stone 12) Robertson batted left-handed and threw right-handed.

The nephew of Baseball Hall of Fame pitcher, manager and club owner Clark Griffith, Robertson was part of an extended family that operated the Washington Senators/Minnesota Twins franchise of the American League for almost 65 years. Robertson was a native of Montreal, Quebec, the son of a minor league player; his father was Griffith's brother-in-law. Robertson moved to the Washington, D.C., area with his widowed mother and six siblings when he was a child. He attended the University of Maryland.

Robertson's brother Calvin was adopted by Clark Griffith, took his uncle's last name and succeeded him as the Senators' president. Calvin Griffith controlled 52 percent of the team's stock (evenly split with sister Thelma Griffith Haynes' 26 percent) and operated the Senators as majority owner from 1955–60. He then moved the club to Minneapolis–St. Paul after the 1960 season, and led the renamed Twins until he sold the club in 1984.

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