With the performance, Guerrero (20 years, 59 days) became the third-youngest player in league history to hit his first two career homers in the same game, according to Stats By STATS.
Jackson was selected to the Blue Jays' roster on Wednesday morning, clearing the way for him to pitch for a record 14th major-league team when he makes the start for Toronto in San Francisco against the Giants. The homer had an exit velocity of 111.3 miles per hour and it traveled a projected 438 feet, according to Statcast.
In the sixth inning Guerrero homered again, a three-run drive estimated at 451 feet, this time off right-hander Reyes Moronta. The tater had an exit velocity of 113.7 mph, per Statcast, and also went to centerfield. Two-sport star Danny Ainge was the previous youngest Blue Jay to homer, doing so on June 2, 1979 at 20 years, 77 days old.
On Tuesday night, Vlad Jr. connected for his first major league home run.
The only active players who registered a multi-homer game at a younger age than Guerrero are Juan Soto, Bryce Harper, Mike Trout, and Machado, according to ESPN Stats & Info. The family already had long-ball history at Oracle Park - the elder Guerrero won the 2007 home run derby at the waterfront stadium.