Ivan Martin Delock (November 11, 1929 – February 28, 2022) was an American Major League Baseball right-handed pitcher who played 11 seasons for the Boston Red Sox and Baltimore Orioles.

He pitched in at least 20 games for the Red Sox every year from 1952 to 1961 (1954 excepted), and had an Adjusted ERA+ of 110 or better in 1955 (114), 1956 (110), 1958 (118), 1959 (138), and 1961 (110).

Delock led the American League with 11 relief wins in 1956 while tying for fourth with nine saves (then not an official statistic).

In 1962, a knee injury shortened his career, which ended the following season after Delock made seven appearances, five as a starting pitcher, for the 1963 Orioles.

Delock died in Raleigh, North Carolina, on February 28, 2022, at the age of 92.