We know USF coach Jeff Scott and his administration have been working the phones like mad trying to fill the three non-conference openings on their fluid 2020 schedule.Question is, which area codes have they dialed?The answers should come soon enough; Scott indicated Saturday that the Bulls could be close to formally filling at least a couple of those vacancies. Meantime, it’s fun to hypothesize about what the overhauled 2020 slate will look like.Here are our most educated guesses at the non-conference foes the Bulls have targeted.Conventional thinking says the Seminoles will look in-state to fill the Sept. 19 vacancy on their schedule, and the Bulls and Florida International both are available that weekend. Forget the cupcake factor; the current talent difference between the Bulls and Panthers appears negligible. Besides, FSU — which has had a turbulent offseason under new coach Mike Norvell — probably isn’t deeming anyone a cupcake. We’re leaning toward USF, if for no other reason than Bulls chief of staff Brad Scott was a Bobby Bowden offensive lieutenant in Tallahassee for more than a decade. Natural story line.This Sun Belt Conference team currently has only one September game (Sept. 12 at Kansas), but hopes to have more finalized this week. One must presume Jeff Scott, who spent his entire adult life in South Carolina before arriving in Tampa, possesses some familiarity with the Chanticleers program.The Division I-AA Big South recently announced it is delaying fall sports until the spring, but is allowing its football-playing schools to compete in up to four non-conference games this fall. At least one of them, Campbell, has scheduled two games (Sept. 12 at Georgia Southern, Sept. 26 at Appalachian State). Chances are, USF could find a last-minute foe in this league willing to travel to Tampa.When you need competition you generally reach out to the folks you know, and Raiders coach Rick Stockstill was Scott’s position coach at Clemson. At this point, the Blue Raiders and Bulls have a common open date (Sept. 12).A total long shot, but hey, when you’re scrambling for games, you might even be inclined to seek opponents you’d normally shun. The Mountaineers, coming off a 13-1 season, still have a vacancy on Sept. 5. It’s also a solid bet Mountaineers athletic director Doug Gillin, a longtime marketing/media executive in ACC country, has a longstanding relationship with Bulls counterpart Michael Kelly.