Robert Emmet McCann (March 4, 1902 – April 15, 1937) was an American professional baseball player and manager.

He was shortstop in Major League Baseball who appeared in seventy-one games for the Philadelphia Athletics in 1920–1921 and Boston Red Sox in 1926.

Listed at 5 feet 11 inches (1.80 m) and 150 pounds (68 kg), McCann batted and threw right-handed.

In parts of three seasons with Philadelphia and Boston, he was a .227 hitter (44-for-194) with eighteen RBI in seventy-one games.

In fifty-seven fielding appearances, he committed sixteen errors in two hundred and fifty-one chances for a .936 percentage.