Mark Roth pioneered the modern power game in bowling and it helped him dominate the polyester ball era when he was on the PBA Tour. So it shouldn't be surprising that two of the premier power players of the past two decades — young right-hander Sean Rash and veteran left-hander Jason Couch — are dominating this week's PBA Mark Roth Plastic Ball Championship Thursday at AMF Thruway Lanes in suburban Buffalo....