Slugging pitcher Shohei Ohtani made his major league debut on Thursday as a hitter and singled in his first at-bat but the Oakland Athletics erased the celebratory mood with a 6-5 walk-off victory over the Los Angeles Angels.The 23-year-old Japanese, who was a spring training invitee on a minor league contract, started as a designated hitter, was booed by the A's home fans when he came to the plate, but connected to right field off right-hander Kendall Graveman in the second inning, advancing Andrelton Simmons to second base."I have to say I was happy," Ohtani said when asked how he felt wh…READ FULL ARTICLE