On May 20, 2006 — Barry Bonds of the San Francisco Giants hits a home run in an interleague game against the Oakland Athletics, tying his home run count with that of Babe Ruth at 714. The ball is hit at the McAfee Coliseum against pitcher Brad Halsey, a left-hander. Because of interleague play, Bonds is the designated hitter rather than his normal spot in the outfield.

Source:
Baseball Reference May 20