Shortstop Pena undergoes surgery

Shortstop Pena undergoes surgery

KANSAS CITY -- Shortstop Tony Pena underwent successful surgery on Tuesday for a fractured left hamate bone, the Royals said.

Pena injured his hand last Saturday at Minnesota while swinging a bat and was placed on the 15-day disabled list. He's expected to miss from four to six weeks.

Dick Kaegel is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.