"The Big Unit" does his best impersonation of "The Babe".

Major League Baseball Hall of Famer Randy Johnson called his shot at the recent USC alumni game, and ripped a pitch to the fence.

The 53-year old Johnson, who won 303 career games, showed here that he's still in pretty good shape.

In case you're wondering, the 6-foot-10, 225-pound Johnson, one of the most feared pitchers of all-time, hit one career home run in 625 at-bats.

One of the things that made Johnson so great was his competitive nature, but it's good to see him showing off the lighter side of his personality in his retirement: