Mike Tyson, Evander Holyfield, Lennox Lewis, Marvin Hagler, Sugar Ray Leonard, Julio César Chávez, and Félix Trinidad were among the boxers whose bouts Larkin promoted.
[2][3] Larkin was involved in marketing, distribution and production of such artists as Paul McCartney, Eric Clapton, Sting, The Rolling Stones, Elton John, Liza Minnelli, Stevie Wonder, Frank Sinatra, Jay-Z, Gloria Estefan, Spice Girls, and Backstreet Boys.
[citation needed] Larkin worked with such celebrities on Showtime as Tim Allen, Ellen DeGeneres, Drew Carey, Jon Stewart, Dave Chappelle, Denis Leary and many others.
He was diagnosed in April 2007, and maintained a correspondence with New York Yankee Bobby Murcer, who was in a similar situation[5] and predeceased him.
Before he died, Larkin stated Nigel Benn versus Gerald McClellan was his most painful moment as a promoter.