Pujols hit is 399th HR tonight off of Pittsburgh's Sean Gallagher. It was his 33rd HR of the season. Barring injury or serious decline, Pujols will join the 400 club this season.
That's not the only significant milestone he will likely achieve this season. Only two players in history have hit .300+/30+HR/100+RBI's in nine seasons, Babe Ruth and Albert Pujols. If Pujols has those stats this season, he will be the only player in history to do it ten seasons in a row.
It is clear that Pujols will go down as one of the best hitters to ever live.