David Albaladejo (better known by his stage name King Syze) is an underground rapper from Philadelphia, Pennsylvania of Puerto Rican decent. He is a member of underground hip hop supergroup; Army of the Pharaohs, having featured on all their studio albums. He is known for his frequent collaboration with AOTP members; OuterSpace. Outside of rap, Albaladejo works as a member of trade union which has inspired the names of many of his studio albums.

Many have likened the witty aggressive flow and opposing mic presence of King Syze to that of Big Pun. King Syze has been featured on notable albums by Jedi Mind Tricks' Visions of Gandhi, Vinnie Paz's God of the Serengeti, 7L & Esoterics DC2: Bars of Death and Outerspaces Blood and Ashes, Blood Brothers, God's Fury and My Brother's Keeper as well as prominent features on the current smash full-length Army Of The Pharaohs' The Torture Papers. He released his first full-length album Syzemology in 2006 and features appearances from fellow Pharaohs Vinnie Paz, 7L & Esoteric, Outerspace, Reef The Lost Cauze, Des Devious as well as verses from Sabac Red (of Non Phixion), Pumpkinhead & Block McCloud as well as production from DJ 7L, Jon Doe, Block McCloud, Louis Logic, Crisis Center and Archrival.