The situation: Winners of five in a row and suddenly tied for the lead in the wild-card race, the Baltimore Orioles made an aggressive and surprising move Wednesday night, calling up their top position prospect in Machado, who just turned 20 last month. Machado was hitting .266/.352/.438 in 109 games at Double-A Bowie and was 16-for-33 with 32 total bases in his past nine games.