There’s having a day on the baseball diamond, and then there’s what Northern Kentucky University’s Liam McFadden-Ackman did on Sunday afternoon. He accomplished a feat that only Fernando Tatis can say he did in Major League history, let alone college baseball.

The NKU Norse were facing Western Michigan, and things quickly turned sour for the Broncos. After scoring once in the first, Western Michigan took an early lead toward the bottom of the infield, but did not hold it for long.

Northern Kentucky sparked 14 runs in that first inning, and McFadden-Ackman is a key reason it happened.

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Victor E. Viking of Northern Kentucky University takes the field for the annual Mascot Tee Ball game on August 27, 2011, at Great American Ball Park in Cincinnati, Ohio. (John Grieshop/Getty Images)

He hit two grand slams in the same inning. Now read that again.

With the bases loaded, McFadden-Ackman, the Nordics’ four-hole hitter, threw a ball to left field that had a home run written on it all along. Four runs were crossed to score and NKU was in control after giving up that run to WMU.

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But the Norse were not finished. They took every chance they got to score five more runs until the lineup returned to McFadden-Ackman with the bases energized again.

He connected well on another ball, and though this one stayed in the air longer than the first, he eventually cleared the fence for another grand slam.

The NCAA logo on the field at TD Ameritrade Park in Omaha, Nebraska.

The NCAA logo on the field at TD Ameritrade Park in Omaha, Nebraska. (Peter Lockley/NCAA Photos via Getty Images)

The video shows McFadden-Ackman legitimately celebrating as he spun around at third base and headed to the plate. This is a once-in-a-lifetime achievement in the sport, and it came in the first inning.

McFadden-Ackman would get one hit in three more at-bats, finishing his 5-for-6 day with four runs scored and 10 RBI, including a two-run single in the sixth inning.

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If there was a mercy rule, Western Michigan would have liked it, as the game ended 27-4 after nine innings. The Nordics had 19 hits to the Broncos’ 10.

Tatis remains the only major league player to hit two grand slams in a single inning, going back to April 23, 1999, when he faced the Los Angeles Dodgers on the road while playing for the St. Louis Cardinals.

In college baseball, however, Caleb Pendleton from the University of Florida Atlanta he accomplished the feat in his first two college at-bats in the same inning in 2021.

A ball and glove on the field before the College World Series on June 24, 2019 at TD Ameritrade Park in Omaha, Nebraska.

A ball and glove on the field before the College World Series on June 24, 2019 at TD Ameritrade Park in Omaha, Nebraska. (Peter Aiken/Getty Images)

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McFadden-Ackman is off to a great start to his 2023 season with the Nordics, hitting .348 with four home runs, 15 RBIs, a double and a triple in seven games thus far.