Robert Clifford Speck (born August 8, 1956) is a former pitcher in Major League Baseball who played for the Atlanta Braves in its 1986 season.

[1] In his second MLB game, he made his only start and defeated the San Diego Padres at Jack Murphy Stadium.

Speck posted a 2-1 record with a 4.13 earned run average in 13 pitching appearances (one start), striking out 21 batters while walking 15 in 28⅓ innings of work for the Braves.

[2] Highlights of his minor league career included pitching in the longest game in the history of professional baseball, a 33 inning affair between Speck's Rochester Red Wings and the Pawtucket Red Sox.

Speck was summoned to replace Steve Grilli with the bases loaded and no out, but he failed, allowing an RBI-single to Dave Koza in a 2-2 count which gave Pawtucket a 3–2 victory.