The Duke and Duchess of Sussex took to the field before the New York Yankees' 17-13 victory over the rival Boston Red Sox at London Stadium. The couple was joined by 10 participants in the Invictus Games, an international projected started by Harry to give wounded veterans a chance at competing in athletic events.
Two members of the Invictus Games threw out the ceremonial first pitches to Red Sox pitcher Chris Sale and Yankees pitcher CC Sabathia.
Harry wore an Invictus Games polo and Meghan opted for a black dress. The couple received a Red Sox onesie and mini Yankees jersey for their 7-week-old son, Archie.
Harry previously threw out the first pitch at a New York Mets game in 2010.
"She didn't know about it," Betts said. " They probably didn't believe it ... I didn't think I'd ever meet her, but I did."