Brent Venables has been pleased with what he’s seen from Oklahoma Sooners quarterback Jackson Arnold this offseason. Following Oklahoma‘s annual spring game last month, Arnold took some time to evaluate his performance. The young quarterback was humble, believing there’s some throws he wishes he could have back, but Arnold was satisfied overall. “I thought I played good,” Arnold said after the scrimmage. “Obviously, there are some plays and some throws that I want back, but overall I thought it was solid. The (offensive) line played great — just the offense as a whole looked great in my opinio…