Since I turned 50 in 2012, the PBA50 Tour has featured two majors: The PBA Senior U.S. Open and the USBC Senior Masters. In November, the PBA announced the addition of a third major — the Treasure Island Resort & Casino PBA50 World Championship presented by Storm July 17-23 — to the 2016 PBA50 Tour schedule. My story is here. On Thursday, the PBA announced the addition of a fourth major for 2016: the PBA50 National Championship to benefit Riley Hospital for Children Aug. 14-17...