Justin Clyde Mashore (born February 14, 1972) is an American professional baseball coach and former player who currently serves as the hitting coach for the Uni-President 7-Eleven Lions of the Chinese Professional Baseball League (CPBL).

[1] He played in Minor League Baseball until 2001 for numerous different organizations: the Tigers, San Diego Padres, Boston Red Sox, New York Mets and Colorado Rockies.

After his playing career he became a coach for numerous minor league teams.

[2] He was named as the hitting coach for the Triple–A New Orleans Baby Cakes of the Miami Marlins organization.

On December 24, 2022, the Uni-President Lions of the Chinese Professional Baseball League hired Mashore to serve as their hitting coach for the 2023 season.