He first appeared on albums from The Beatnuts, on the track “Off the Books” in 1997, and on Fat Joe’s second album Jealous One’s Envy in 1995, on the track “Watch Out”, prior to signing to Loud Records as a solo artist. Big Pun’s career was cut short in 2000 at age 28 when he died of a heart attack.
Big Pun - Wikipedia
Big Pun - The Internet Movie Database
Christopher Rios, 28, Rapper Recorded Under Name Big Pun - Obituary NYTimes 2/9/2000
Big Pun: The Legacy documentary - YouTube
Big Pun Biography - Big Pun Forever