Nationals general manager Mike Rizzo says he is not under investigation for verbally confronting umpires underneath the stands following a controversial call. Rizzo said he contacted Joe Torre, Major League Baseball's vice president of operations, immediately after Thursday's game in New York, which concluded with players and staff on the Nationals bench jawing at the departing umpires following a crucial ninth-inning call. "Despite a lot of the reports in the media, this by no means is an investigation against Mike Rizzo," Rizzo said.