Rookie Gresham Wagner scored his second Battery Tender Global Mazda MX-5 Cup presented by BFGoodrich Tires pole position of the year for Saturday’s (stream at MazdaMotorsports.com 11:25 a.m. ET) Round Seven race.Wagner’s lap of 1m36.3086s in the No. 8 Sick Sideways Racing entry edged out Robert Stout (No. 28 McCumbee...