 UFC 37.5 was the first UFC event to feature Joe Rogan as a color commentator but he would leave again to host Fear Factor, and return at UFC 40.Joe made several UFC appearances prior to UFC 37.5 as the behind-the-scenes interviewer starting at UFC 12.UFC 37.5 was a last-minute event specifically held to promote the UFC on Fox Sports Net's "The Best Damn Sports Show Period", where the "best fight" of the night was to air during the "BDSSP"'s "All Star Summer" celebration in June 2002.