James J. Baldwin, Jr. (born July 15, 1971 in Southern Pines, North Carolina) is a former Major League Baseball pitcher. He batted and threw right-handed. In his 11-season career, he played for the Chicago White Sox (1995-2001), Los Angeles Dodgers (2001), Seattle Mariners (2002), Minnesota Twins (2003), New York Mets (2004), Baltimore Orioles (2005), and Texas Rangers (2005).

He made his major league debut on April 30, 1995, for the White Sox. In 2000, he made the Major League Baseball All-Star Game as a member of the White Sox. On January 24, 2006, he signed a minor league contract with the Toronto Blue Jays.

Baldwin is currently the manager for the baseball team at Pinecrest High School in Pinehurst, NC. He lives with his family and enjoys playing golf at Forest Creek Golf Club, a private golf club where he is a member in Southern Pines, North Carolina.