| Mark Isip | |
| League: | UAAP |
| Team: | FEU Tamaraws |
| Position: | Assistant coach |
| Height Ft: | 6 |
| Height In: | 4 |
| Weight Lbs: | 215 |
| Nationality: | Filipino |
| Birth Date: | 10 December 1980 |
| Birth Place: | Manila, Philippines |
| Draft Year Pba: | 2006 |
| Draft Round Pba: | 1 |
| Draft Pick Pba: | 6 |
| Draft Team Pba: | Sta. Lucia Realtors |
| College: | FEU |
| Career Start: | 2006 |
| Career End: | 2019 |
| Career Position: | Power forward |
| Coach Start: | 2019 |
| Years1: | 2006–2007 |
| Team1: | Sta. Lucia Realtors |
| Years2: | 2007–2008 |
| Team2: | Coca-Cola Tigers |
| Years3: | 2008–2009 |
| Team3: | Rain or Shine Elasto Painters |
| Years4: | 2009–2010 |
| Team4: | Talk 'N Text Tropang Texters |
| Years5: | 2010 |
| Team5: | Barako Bull Energy Boosters |
| Years6: | 2010–2012 |
| Team6: | Meralco Bolts |
| Years7: | 2012–2013 |
| Team7: | Air21 Express |
| Years8: | 2013 |
| Team8: | Petron Blaze Boosters |
| Years9: | 2013–2014 |
| Team9: | Barako Bull Energy |
| Years10: | 2014–2016 |
| Team10: | GlobalPort Batang Pier |
| Years11: | 2018–2019 |
| Team11: | Makati Skyscrapers / Super Crunch |
| Cyears1: | 2019–present |
| Cteam1: | FEU (assistant) |
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).
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).
|-| align=left | | align=left | Sta. Lucia| 45 || 12.7 || .493 || .000 || .609 || 2.4 || .2 || .2 || .1 || 3.8|-| align=left | | align=left | Coca-Cola / Welcoat| 35 || 10.5 || .431 || .000 || .632 || 2.4 || .2 || .1 || .1 || 3.0|-| align=left | | align=left | Rain or Shine| 46 || 15.2 || .490 || .091 || .741 || 3.5 || .3 || .0 || .1 || 6.4|-| align=left | | align=left | Talk N' Text / Barako Bull| 18 || 10.1 || .500 || .000 || .750 || 2.2 || .4 || .2 || .1 || 5.1|-| align=left | | align=left | Barako Bull / Meralco| 32 || 24.3 || .450 || .000 || .699 || 5.6 || .6 || .3 || .1 || 11.5|-| align=left | | align=left | Meralco| 34 || 20.9 || .462 || .000 || .682 || 4.2 || .6 || .2 || .2 || 7.3|-| align=left | | align=left | Air21| 38 || 21.7 || .466 || .143 || .780 || 4.1 || .8 || .1 || .2 || 8.1|-| align=left | | align=left | Barako Bull| 24 || 15.3 || .386 || .000 || .800 || 3.0 || .5 || .2 || .2 || 5.3|-| align=left | | align=left | GlobalPort| 34 || 17.0 || .407 || .333 || .780 || 4.1 || .2 || .2 || .1 || 5.3|-| align=left | | align=left | GlobalPort| 8 || 7.9 || .500 || .500 || .000 || 1.3 || .3 || .0 || .0 || 2.8|-class="sortbottom"| align=center colspan=2 | Career| 314 || 16.4 || .456 || .194 || .720 || 3.5 || .4 || .2 || .1 || 6.1