Royals prospect Eric Hosmer made his major league debut Friday night in Kansas City against the Oakland A’s and ended up 0-2 with 2BB, 2K and a stolen base. The A’s beat the Royals 3-2.

Hosmer is the top prospect in the Royals’ organization, according to Baseball America and was hitting .439/.525/.582 with 3 HR and 15 RBI at AAA Omaha.

While the Royals have one of the top-rated farm systems in the game as the club tries to climb back to the prominence it had in the 70’s and 80’s, Hosmer is at the head of the class. Last year Baseball America had him ranked fifth in the system and after a stellar 2010 that featured AAA All-Star and Futures Game selection, he hit the top spot this year.

It was a tough opening assignment for the left-handed hitting Hosmer as he drew tough A’s southpaw Gio Gonzalez. The Kansas City faithful came out in force with a walk-up crowd of almost 10,000 reported. The paid attendance was 30,690, a lively crowd for a franchise on the rebound.

Hosmer and blue-chip 3B Mike Moustakas are the first of a wave of prospects that GM Dayton Moore hopes to see make an impact as the club looks to build back up to a perennial winner.