Your best player gets sidelined for a lengthy period, perhaps the rest of the season, and yet you prosper. That’s been the strange scenario recently in Music City, where the Tennessee Titans still have their groove despite losing running back Derrick Henry—also the top player in the AFC South—to a broken foot. “Derrick’s a guy, he’s hard to replace,” center Ben Jones says. “He’s done it multiple years now. We kind of got a rhythm with him, knowing how he hits runs and stuff. So it’s definitely some learning curve, and we’ve got to do as an offensive line. We’ve got to keep grinding and just make this run game come to life.” Tennessee (7–2), with a 3 1/2-game lead in the division and standing atop the entire conference, hosts New Orleans (5–3) on Sunday. The Titans are 6–0 against 2020 playoff teams, including wins in four straight games. Tennessee …