John Weekly (June 14, 1937 – November 24, 1974) was an American professional baseball player whose career extended from 1956 through 1965.

Weekly batted and threw right-handed; he stood 6 feet (1.8 m) tall and weighed 200 pounds (91 kg).

He grounded out to the second baseman as a pinch hitter off Jack Hamilton of the Philadelphia Phillies in the ninth inning of a 3–2 defeat at Connie Mack Stadium.

[1] Six days later, he collected his first MLB hit: a solo home run off the Chicago Cubs' Don Cardwell in a 6-0 Houston triumph at Wrigley Field.

[2] Weekly was returned to the Giants' system in mid-May after starting five games in the outfield and 13 total appearances; his five hits included three extra-base blows, among them his second big-league homer (off Pete Richert of the Los Angeles Dodgers) on May 7.