Lerrin Harris LaGrow (born July 8, 1948) is an American former professional baseball pitcher, who played 10 seasons in Major League Baseball (MLB) with the Detroit Tigers (1970), (1972–1975), St. Louis Cardinals (1976), Chicago White Sox (1977–1979), Los Angeles Dodgers (1979), and Philadelphia Phillies (1980).

The Tigers brought LaGrow up in July 1970, and he compiled a 7.30 earned run average in 10 relief appearances.

After spending the 1971 season in the minor leagues, LaGrow rejoined the Tigers in 1972 and 1973, appearing in 37 games, 34 of which were in relief.

In the bottom of the seventh inning, Bert Campaneris came to bat, having had three hits, two runs scored and two stolen bases in his first three at-bats.

He was traded from the Cardinals to the Chicago White Sox for Clay Carroll during spring training on March 23, 1977.