The couple's made their first visit to London's former Olympic stadium nearly after nine years when Harry first took place in a baseball game, throwing the ceremonial first pitch at a New York Mets game in 2010.
Despite just having a baby, Meghan Markle is not letting anything get in her way or royal duties.
Arsenal set asking price for shock Manchester United target Pierre-Emerick Aubameyang
He spen the second half of last season on loan at Bournemouth and was in their side beaten 5-3 by Palace. I've been there myself so it's important that we support him regardless of the outcome".
"That is incredible. Thank you", she told the team.
The couple was also accompanied by 10 Invictus participants.
Before play started, the duke and his American wife stood in the sunshine in the centre of the London Stadium field with Invictus Games Foundation representatives as both the USA and United Kingdom anthems were sung. Wearing a similarly-hued outfit, Harry proudly wore a black Invictus Games polo with a pair of dark trousers.
The Yankees' starting pitcher will be left-hander Stephen Tarpley, who will be used as an opener in what will be an all-bullpen game.
In Game 1 of the London Series between the Yankees and Red Sox, the game started off nutty and ended even nuttier. The teams will play a second game on Sunday, and it's also reportedly sold out. The little one didn't accompany his parents to the game, but Meghan and Harry did get some special gifts to take home to him.
The couple plan to resume a full-scale royal schedule in about four months with a trip to South Africa that will mark Archie's debut on the worldwide stage.