Dallas then strongly indicated the focus had shifted to cornerback and stuck with that plan in the NFL draft. Two stars emerged last year — one anticipated, one not — with rookie sensations Ezekiel Elliott, the fourth overall pick who turned into the NFL rushing champion, and quarterback Dak Prescott, the league's biggest surprise as a fourth-rounder who took over when Tony Romo was hurt. Like with Elliott and Prescott, the Cowboys adhered to their preference of players from major programs, getting two former Michigan teammates in defensive end Taco Charlton (28th overall in the first round) and cornerback Jourdan Lewis (third round). [...] don't forget about Charles Tapper, a third-rounder from last year who missed his rookie season with a back injury. Dallas took him in the second round last year knowing he was a long shot to play as a rookie because of a college knee injury. Switzer, who tied an NCAA record with five punt returns for touchdowns as a freshman, will have a good chance to be the primary returner.