Roberto Clemente's 1964 Silver Bat Award Sells For More Than $300k

Someone's trophy case just got a whole lot cooler -- Roberto Clemente's Silver Bat award from 1964 just sold at auction ... and it came with a hefty price tag!!

TMZ Sports has learned ... the awesome trophy given to the Pirates legend for having the highest batting average in the National League during his tenth season has a new owner after being made available at SCP Auctions this month.

Bidding closed over the weekend ... and the final number came out to be $307,500.

It was quite the popular item, as the bids skyrocketed over the final days of the auction.

As we previously reported, the Silver Bat -- inscribed with "BATTING CHAMPION 1964 NATIONAL LEAGUE B.A. .339" -- was modeled after Clemente's 34-inch Louisville Slugger bat ... and is made of 55.6 Troy ounces of silver.

Even though the award is more than half a century old, it's in great condition and only has a few blemishes.