On May 17, 2019 — Kris Bryant hits three homers in consecutive innings – the 7th, 8th and 9th – to lead the Cubs to a 14 – 6 win over the Nationals. He is just the 12th player to pull off the rare feat, and the second to do so in those particular innings. He goes 4 for 6 and drives in 5 runs in the game.
Source:
Baseball Reference May 17