An outdoor concert at Boulan Park in Troy, originally slated to be held Thursday, Aug. 17, has been rescheduled for Aug. 31.Motor City Kings, a Detroit-area group performing blues, classic rock, soul and Motown, will play from 6:30 p.m. to 8:30 p.m. at the park, on Crooks Road between Big Beaver and Wattles roads.