Federal prosecutors have been investigating whether veteran NBA player Terry Rozier manipulated his performance as part of an illegal sports betting scheme. The inquiry into Rozier is part of a wider government probe into a sprawling ring of gamblers and poker players who have allegedly rigged games across the sports landscape, people familiar with the matter said. The same investigation has already led to a criminal charge and a lifetime ban from the NBA for former Toronto Raptors forward Jontay Porter.