Nathaniel John Cartmell (January 13, 1883 – August 23, 1967), also known as Nat and Nate, was an American athlete who won medals at two editions of the Olympic Games.

Importantly, Nate was on first racially integrated Men's Medley relay team that won Olympic gold medal at the 1908 London Olympics, which Nate helped form and featured Nate's fellow University of Pennsylvania alumnus and former teammate, Dr.[3] John Baxter Taylor Jr., the first black athlete in America to win a gold medal in the Olympics.

[4] Nate is also known for being the first head coach of the North Carolina Tar Heels men's basketball team[5] While the reason why Cartmell was nicknamed "Bloody Neck" is not entirely known, author Ken Rappoport speculates that it either comes from his use of the term Bloody due to the fact his family came from Cartmel, England, or from the fact that he had a childhood accident where he lost two and a half fingers from his right hand when an ax slipped while he was chopping wood.

[1] Cartmell was a member of the gold medal American medley relay team at the 1908 Summer Olympics in London.

In both the first round heat and the final Cartmell received a lead from Hamilton and built upon it before turning over the race to Taylor.

[8] In 1910, student Marvin Rich along with certain school officials helped lobby to create a varsity basketball squad at UNC.

Recognized as one of the most respected athletes and coaches of his era, Nathaniel John Cartmell died in his home in New York City on August 23, 1967.