Keith Damon Appling (born February 13, 1992) is an American professional basketball player who last played for the Erie BayHawks of the NBA Development League. He played college basketball for Michigan State University. 
High school career
Appling played high school basketball at Pershing High School in Detroit. In 2009, as a junior, he led his team to win the Michigan High School Athletic Association Class A Basketball Championship.  During the title game, he set a MHSAA Championship Game record by scoring 49 points.  The next year, as a senior, he was the Mr. Basketball of Michigan award winner.  At the end of his high school career, he was considered a high level recruit and was the 34th ranked player using the RSCI (Recruiting Services Consensus Index) rankings. In his senior campaign, Appling averaged 28 points, 6 rebounds and 5 assists.  He was selected to play in the 2010 McDonald's All-American Boys Game during which he scored 10 points.
As a freshman at MSU, Appling averaged 6.4 points and 2.8 rebounds per game, while shooting over 41% from three-point range. In his sophomore year, he averaged 11.6 points, 2.9 rebounds and 3.9 assists per game. He earned All-Big Ten third team honors while leading the Spartans to the Big Ten regular season and tournament championship. In his junior year, he started every game and lead the Spartans in scoring with 13.4 points a game and assists with 3.3 per game while earning All-Big Ten second team honors. In his senior year, he averaged 11.2 points, 3.0 rebounds and 4.5 assists per game.  
After going undrafted in the 2014 NBA draft, Appling joined the Portland Trail Blazers for the 2014 NBA Summer League. On September 23, 2014, he signed with the Los Angeles Lakers,  but was later waived on October 20.  On November 1, he was acquired by the Los Angeles D-Fenders as an affiliate player of the Lakers.  On March 7, 2015, he was traded to the Erie BayHawks in exchange for the returning player rights to Cleveland Melvin.  In 38 D-League games in 2014–15 (28 for Los Angeles, 10 for Erie), Appling averaged 10.5 points, 3.0 rebounds and 3.9 assists in 24.4 minutes per game.
In July 2015, Appling joined the Orlando Magic white team for the 2015 NBA Summer League.  On September 24, he signed with the Magic,  but was later waived by the team on October 19 after appearing in five preseason games.  On October 31, he was reacquired by the Erie BayHawks.  On January 18, 2016, he signed a 10-day contract with the Magic.  He made his NBA debut that night in a 98–81 loss to the Atlanta Hawks, recording two points and one steal in eight minutes of action.  On January 29, he signed a second 10-day contract with the Magic.  That same day, he was named in the East All-Star team for the 2016 NBA D-League All-Star Game.  On February 8, after his contract expired, he was reacquired by the BayHawks.  At the season's end, he earned NBA D-League All-Defensive Team honors. 
Appling is the son of Tottie Williams and majored in Sociology.