Grand slams are cool. Four runs on one swing.
Extra-inning grand slams aren't just cool. They are pretty darn rare.
There have been only two this season: the Cincinnati Reds' Todd Frazier did it on June 17 versus Detroit.
And the Orioles' Chris Davis accomplished it Wednesday afternoon against the Oakland Athletics to give the Orioles a 7-3 win at O.co Coliseum.
Thanks to baseball-reference.com and baseball historian Bill Arnold, we discovered just how rare an extra-inning grand slam is in Orioles franchise history.
Davis' was the seventh – for a modern-day franchise that goes back to 1954.
Matt Wieters has done it twice, in 2012 (at the Chicago White Sox) and 2013 (at home versus the Tampa Bay Rays).
The others: Harold Baines versus the White Sox at Camden Yards in 1999; Joe Nolan at home versus the Toronto Blue Jays in 1982; Tommy Davis at Milwaukee in 1975 and Brooks Robinson in 1970 versus the New York Yankees at home.
Here's the really weird thing: All of them occurred in the 10th inning.
According to Arnold, with research that goes back to 1936, the St. Louis Browns, the Orioles' predecessor, never had an extra-inning slam in that time frame.
One other note here: The most famous walk-off grand slam in Orioles history was probably Chris Hoiles' blast against the Seattle Mariners at Camden Yards in 1996. But that one was in the bottom of the ninth – not in extras.