Since private equity firm Spire Capital Partners took controlling interest in 2007, the Professional Bull Riders has undergone some major changes, including strengthening its leadership ranks and emphasizing the recruitment of sponsors in non-endemic categories. The organization earlier this year hired sports marketing veteran Jeffrey Pollack as executive chairman after Randy Bernard, who had been PBR CEO for 15 years, left to take the same position with the Indy Racing League.More recently, the...