Roki Sasaki’s Major League Baseball debut was equal parts electrifying and erratic, with the Los Angeles Dodgers right-hander displaying a powerful arm but also a wild streak that limited his outing to three innings at the Tokyo Dome. The Japanese phenom gave up just one run and one hit while striking out three, but also walked five batters, including one free pass that forced in a run. He threw 56 pitches, including 31 balls and 25 strikes. The 23-year-old’s first six pitches of his career blazed toward the plate at 99.5, 99.5, 100, 100.5, 99.4 and 98.9 mph, and he retired the first three Chicago Cubs batters in order, including countryman Seiya Suzuki on a swinging strikeout.