Orioles rookie Manny Machado hit his first career home run in his second major league game, blasting a solo homer to left in the fifth inning Friday night.One inning later, he hit another.In doing so, the 20-year-old Machado became the youngest Oriole to have a multi-HR game. That record formerly belonged to Boog Powell (5/2/62) at 20 years, 250 days.Machado took a full-count 83-mph hanging slider from Royals right-hander Luke Hochevar into the left-field stands in his second at-bat in the fifth.The homer put the Orioles up 3-1. (Second baseman Omar Quintanilla hit a two-run homer in the second inning.)The Orioles recovered the first ball in exchange for a few Machado autographed baseballs and a signed bat.Machado isn't the youngest Oriole to homer in a game. That distinction belongs to Jim Palmer, who did it at age 19 on May 16, 1965.