Terrence Deon Long (born February 29, 1976) is a former outfielder in Major League Baseball. Long batted and threw left-handed.
The New York Mets drafted Long in the first round (20th pick) of the 1994 amateur draft. On July 23, 1999, the Mets traded him and minor leaguer Leo Vasquez to the Oakland Athletics for Kenny Rogers.The 1999 season was a stellar season for Long. He finished the season by hitting .288 with 18 home runs and 80 RBI's and finished 2nd in Rookie of the Year award voting. On November 26, 2003, the Athletics traded him and Ramon Hernandez to the San Diego Padres for Mark Kotsay. On November 8, 2004, the Padres traded Long, Dennis Tankersley, and cash to the Kansas City Royals for Ryan Bukvich and Darrell May. In 2006, Long signed a minor league contract with the New York Yankees, who later called him to the major league level on May 21, 2006, to replace an injured Hideki Matsui. On July 7, Long was designated for assignment by the Yankees and released.