Curtis Cordell Barclay (August 22, 1931 – March 25, 1985) was an American professional baseball player. A right-handed pitcher, Barclay appeared in 44 games in Major League Baseball for the New York and San Francisco Giants between 1957 and 1959. In his only full season in MLB, in 1957, he was a member of the pitching staff of the final Giants team to represent New York, working in 37 games, 28 as a starting pitcher, and posting a 9–9 won–lost record. His 3.44 earned run average led Giants' starters and he pitched two shutouts, back-to-back blankings of the Brooklyn Dodgers (August 6) and Philadelphia Phillies (August 11). They would be the only shutouts of Barclay's MLB career.