Legendary Main Source rapper-producer Large Professor discovered Nas, recruiting him to drop his jaw-dropping opening verse on "Live at the BBQ" in 1991. So it's only right that he produced three dusty tracks on Illmatic, "Halftime," "It Ain't Hard to Tell" and "One Time 4 Your Mind," which anchor the LP. Large Pro launched an underappreciated solo career afterwards, but he's stayed busy by producing for MCs, including Slaugherhouse's Joell Ortiz, Action Bronson, AZ, Boot Camp Clik and others. In 2001, P reconnected with his protégé on "You're Da Man" and Rewind," two highlights from Nas's Stillmatic. More recently, he's been producing for and rapping alongside fellow Queens native N.O.R.E.