Ohio State announced Friday that today’s spring game is a sellout. It just goes to show that fans are interested in trying to discern the makeup of the 2017 team, in which seven starting jobs are changing hands.

With that in mind, here are five areas to watch as the Buckeyes wrap up spring practice:

• Defensive backs: OSU is replacing three starters in the secondary, including both cornerbacks. Safety Damon Webb is the lone returning full-time starter, and Jordan Fuller and Erick Smith are competing for the spot occupied a season ago by Malik Hooker. Denzel Ward, who played enough to be considered a full-time player last season, has one of the cornerback spots locked up. Junior-college transfer Kendall Sheffield and returnee Damon Arnette are in the mix for the other, but there are three early enrollees and highly regarded prospects from the 2017 recruiting class — Jeffrey Okudah, Shaun Wade and Marcus Williamson — to keep an eye on.

• Quarterback: Starter J.T. Barrett is the first to admit there were areas in the passing game that required improvement this spring. But it’s the competition for the backup job between Joe Burrow, a spring star a year ago, and Dwayne Haskins Jr. that could dominate the spotlight today. Celebrated freshman Tate Martell could even steal the show, given the chance. As always, this year’s backup is next year’s heir apparent.

• Wide receivers: Coach Urban Meyer entered the spring seeking a major upgrade in the deep passing game and more aggressive play from his receivers. Yet the players who are being praised for their progress are pretty much the ones who fell short last season: Terry McLaurin, Parris Campbell, K.J. Hill, Johnnie Dixon, Binjimen Victor and Austin Mack. Has there really been a transformation, or will fans have to wait for the summer arrival of Trevon Grimes to stir the pot? Meanwhile, keep an eye on corner-turned-receiver Eric Glover-Williams, who’s electric with the ball in his hands.

• Right guard: The big question along the offensive line is who will provide depth to augment returning starters Billy Price, Jamarco Jones, Michael Jordan and the beleaguered Isaiah Prince, who was uneven at right tackle last season. Demetrius Knox appears to be the first choice at right guard, while Matt Burrell has made major strides. The pressure is on Josh Alabi, Brady Taylor, Malcolm Pridgeon, Gavin Cupp, Jack Wohlabaugh and early enrollee Josh Myers to show they belong.

• Running back: Mike Weber is in no jeopardy of losing his starting job; in fact, by all reports he has only enhanced his status. The competition is at backup between Demario McCall, underutilized as a freshman last year, and freshman J.K. Dobbins, who has shown he has the wiggle needed to become a big-time back. Both flashed in a scrimmage a week ago and both want to leave their mark today.