The 20-year-old Machado batted .375 (6-for-16) with a double, a triple, three homers, seven RBIs and five runs scored in his first four games in the Major Leagues. He went 2-for-4 with a triple and a run scored in his debut on Thursday.
Machado has hit safely in all four games of his budding career, and hit a pair of homers with four RBIs in Friday's 7-1 win over the Royals.
Machado became the youngest Oriole since Jim Palmer in 1965 to hit a homer, and he also became the youngest in club history to record a multihomer game, breaking Boog Powell's 1962 mark by 223 days. Machado is just the 15th player since 1918 to have a multihomer performance in his first or second Major League game, but he was the second to do it this season, joining San Diego's Yasmani Grandal.
"I was impressed," Royals manager Ned Yost said of Machado, who closed the week with a two-run homer in the second inning on Sunday. "The scouting reports we got on him said he had a couple of holes in his swing, but we couldn't find 'em. He hurt us. He actually won two games against us with homers. He's going to be a good player."
The third overall pick in the 2010 First-Year Player Draft, Machado -- a natural shortstop -- has moved over to third base since joining Baltimore.
Prior to the promotion, Machado was named the Eastern League Player of the Week for the period ending August 5, after he went 10-for-21, including a cycle on August 4.
In his final nine games with Double-A Bowie, Machado was 16-for-33 with three home runs, two triples, three doubles and seven RBIs.
Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Twitter @britt_ghiroli. This story was not subject to the approval of Major League Baseball or its clubs.