Justin Theodore McLaughlin (March 24, 1912 – September 27, 1964) was a relief pitcher in Major League Baseball who played from 1931 through 1933 for the Boston Red Sox. Listed at 5 ft 11 in (1.80 m), 155 lb., McLaughlin batted and threw left-handed.
A native of Brighton, Massachusetts, McLaughlin attended Boston College. In a three-season major league career, McLaughlin posted a 10.27 ERA in 16 appearances for the Red Sox, including four strikeouts, 17 walks, 42 hits allowed and 23+2⁄3 innings of work, without gaining a decision or save. In 1935, McLaughlin played for Falmouth in the Cape Cod Baseball League. He died in 1964 in Cambridge, Massachusetts at age 52.