Brent Venables had a decision to make at quarterback this offseason, opting to head into the SEC with Jackson Arnold. He will be a first-year starter for the Sooners after being a Five-Star Plus+ prospect out of Denton (TX) Guyer. Oklahoma fans have been waiting for Arnold from the moment he committed, even former program legends are excited. Former Heisman Trophy winner Jason White is like plenty of others in Norman, expecting a big season out of Arnold. White points toward the youngster’s arm, being able to throw a deep ball. And with the wide receivers Oklahoma has at their disposal, White …