Shohei Ohtani hit another towering home run on Tuesday, driving in an insurance run in the ninth inning of the Los Angeles Dodgers’ 4-1 victory over the Washington Nationals. Ohtani led off the top of the ninth by crushing a 1-0 splitter from Matt Barnes for his sixth home run of the season. The ball traveled 450 feet into the right-center second deck at Nationals Park. It was the 29-year-old slugger’s 177th homer of his major league career, coming two days and one game after his No. 176 moved him past Hideki Matsui for the most home runs by a Japanese-born major leaguer. Before Ohtani’s blast…