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Friday night, right-hander Jordan Zimmermann is making what might be his final home game with the Nationals. He's scheduled to become a free agent after the season and Washington might not want to pay the huge dollars he'll command.

Zimmermann drew the Phillies in his potential final home start (GameTracker), and the lineup Philadelphia is running out there is ... well ... just look:

Egads. No offense to those guys, but man, that's as bad a lineup as I've seen in a big-league game in a long time, and we've seen some bad ones in recent years.

Naturally, that Phillies lineup scored four runs through three innings against Zimmermann. All four runs came on one swing too -- outfielder Aaron Altherr hit an inside-the-park grand slam. To the video:

Michael Taylor gets an assist for missing the dive and allowing the ball to get by him. Altherr can fly though. Gosh. He was around the bases in roughly 15 seconds flat. He hit another home run later in the game too. That was a more traditional over-the-fence job though (video).

So when was the last inside-the-park grand slam? A long time ago. Randy Winn with the then-Devil Rays did it on the final day of the 1999 season:

You gotta love baseball. Every day you see something amazing.

Aaron Altherr hit an inside-the-park grand slam Friday.
Aaron Altherr hit an inside-the-park grand slam Friday. (MLB.com screen grab)