George Elvin Walberg (July 27, 1896 – October 27, 1978) was an American professional baseball player.

He played in Major League Baseball as a left-handed pitcher from 1923 through 1937, most notably as a member of the Philadelphia Athletics dynasty that won three consecutive American League pennants from 1929 to 1931, along with the World Series in 1929 and 1930.

When Mack dismantled the Athletics in 1933, he was sent along with Lefty Grove and Max Bishop to the Boston Red Sox in exchange for two players and $150.000.

He was a spot starter and reliever with Boston during three seasons and pitched his last game at the age of 41.

In a fifteen-season major league career, Walberg posted a 155–141 record with 1085 strikeouts and a 4.16 ERA in 2,644 innings, including 15 shutouts and 140 complete games.