Jacob Christopher "Tito" Ortiz (born January 23, 1975) is an American mixed martial artist and former UFC Light Heavyweight Champion, having held the title from April 14, 2000 to September 26, 2003. Along with fighters like Randy Couture and Chuck Liddell, he was one of the sport's early stars. Ortiz ultimately became the biggest pay-per-view draw of 2006 for his fights with Liddell, Forrest Griffin, and Ken Shamrock.

Outside of his fighting career, Ortiz is the CEO of the Punishment Athletics MMA equipment and clothing line. He also owns an MMA training gym called Punishment Training Center, which is located in Huntington Beach, CA.

Jacob Ortiz was born to Samuel and Joyce Ortiz. He received his nickname "Tito," which means tyrant from his father when he was a year old. Joyce has three sons from a previous marriage. His mixed heritage (Mexican father, American mother) is reflected in his ring entrances as he bears both Mexican and American flags.