Marino Paul Pieretti was an Italian-born American professional baseball player. Born in Lucca, Tuscany, he grew up in San Francisco's North Beach district. He was a right-handed pitcher who appeared in 194 games (68 as a starter) from 1945 through 1950 for the Washington Senators, Chicago White Sox, and Cleveland Indians.

A stalwart in the Pacific Coast League of the era (he won 122 games and lost 112 for various PCL teams between 1943 and 1956), he came to the Majors after winning 26 games for the 1944 Portland Beavers. He was known as "Submariner" in his stint with the Beavers because of his sidewinder delivery.

Pieretti, who worked in a slaughterhouse in the offseason, lived in San Francisco after his playing days. After retiring, he worked a lot of Italian weddings as an accordion player in a dance band. He later pitched batting practice for the Seals, and for many years ran youth baseball programs and clinics. When he was stricken with cancer in the mid-1970s, his friends — many of them former baseball players from the Bay Area — organized "The Friends of Marino Pieretti" to buoy his spirits.

(excerpted from Baseball Almanac, BR Bullpen & Wikipedia)