It took almost the whole season, but Babe Ruth hit his 500th career home run on August 31, 1930. The 35 year-old Ruth struggled all year, and managed just 4 home runs through the end of August. While he played the entire season injury free, Ruth just isn't the player he once was.
At one point I though Ruth could hit 800 career home runs, and maybe be the all-time home run king. At this point I'm not even sure Ruth will hit 600 career home runs. He'll go out on top of the career home run list, but his career home run mark won't be as difficult to pass as his season home run mark.