The National Thoroughbred League (NTL) added several key investors to join their roster of team owners, including NBA legend Julius Erving (Philadelphia Stallions) and country music's Tanya Tucker (Nashville Dreams), as the league expands from six franchises to ten ahead of its second season, the operation said in a release on Thursday. This time around the league will boast almost $3 million in prize purses, up from less than $1 million last year. Erving and Tucker join NTL's list of partners, including Nelly, Rick Ross, Kayvon Thibodeaux and Moira Forbes,...