Jason Bay
On July 31, Moss was traded along with pitcher Craig Hansen to the Pittsburgh Pirates in a three-team deal that sent Manny Ramirez to the Los Angeles Dodgers and Jason Bay to Boston. Moss immediately became the team's starting left fielder, replacing the departed Bay. He was later shifted to right field. He batted .222 with a .288 on-base percentage for the Pirates, in 158 at-bats.