Mark Gracer P. Isip (born December 10, 1980 ) is a Filipino professional basketball coach and former player. Isip played college basketball for the FEU Tamaraws, where he is currently an assistant coach. He was then drafted sixth overall by the Sta. Lucia Realtors in the 2006 PBA draft and played ten seasons in the Philippine Basketball Association (PBA).

This biography of a living person needs additional citations for verification. (August 2013)

Isip only played limited minutes in his first few years until he played for the Barako Bull Energy Boosters during most of the 2010–11 PBA Philippine Cup where he had a number of double-double performances. In 2014, he was traded to GlobalPort for Jondan Salvador.^[1]

Isip also played in the Maharlika Pilipinas Basketball League (MPBL) for the Makati Skyscrapers (later the Makati Super Crunch).

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