Jared Abbrederis and Jeff Duckworth are the only two WRs with significant playing experience, and no other player dazzled or separated himself from the rest during spring ball. Chase Hammond said his length could make a difference at the slot. “A big receiver is something that can help a lot,” the 6-5 redshirt sophomore said. “We can stretch the field, make big plays in the red zone and the [QBs] can put the ball up high.” No. 2 -- Filling holes in secondary? Marcus Cromartie and Peniel Jean have experience at CB, and coach Bret Bielema said he’s confident S slots will be strong despite gaps that occurred with eligibility losses of FS Aaron Henry and SS Antonio Fenelus. “I think [SS] Shelton Johnson and [FS] Dezmen Southward together might give us the best safety combination since I’ve been here coaching-wise,” Bielema said.  No. 3 -- Who is the No. 1 QB? Danny O’Brien is intent on following in Russell Wilson’s transfer footsteps and earning the starting QB job. He’ll move to Madison in June to begin summer workouts, and has two seasons of eligibility left. The biggest obstacle in his path will be redshirt freshman Joel Stave, who said his competitive nature won’t be diminished with O’Brien’s arrival from Maryland. “As they say now, it’s an open competition,” Stave said.