Jun 13, 2017; Pittsburgh, PA, USA; Pittsburgh Steelers running back James Conner (30) participates during drills in minicamp at the UPMC Rooney Sports Complex. Mandatory Credit: Charles LeClaire-USA TODAY Sports ORG XMIT: USATSI-360372 ORIG FILE ID: 20170613_jfv_al8_615.jpg

The hottest-selling NFL jersey doesn’t belong to Tom Brady or Von Miller or Aaron Rodgers. Or any of the NFL many stars, for that matter. It belongs to a rookie who has no chance of starting for his team this season.
It belongs to Steelers RB James Conner, the team’s third-round pick in the 2017 NFL draft.
If you’re familiar with Conner’s story, you know why he’s leading the entire league in jersey sales. If you don’t, you’ll understand soon enough.
Conner was a star running back at Pitt. He rushed for 1,765 yards and 26 touchdowns en route to winning ACC player of the year in his sophomore season. A college star being drafted by his local NFL team certainly boosts jersey sales, but that’s not why his jersey is flying off the shelves now. What happened the following season endeared him to football fans in Pittsburgh and around the country.
“But while …