Orioles right fielder Nick Markakis has a hamate fracture of his right wrist and will undergo surgery Friday in Florida. The procedure will be performed by hand specialist Dr. Brian Schofield. The injury is believed to have occurred more than a week ago when Markakis slid into a base. He then aggravated it during his final at-bat Tuesday against the Blue Jays. He is expected to miss two to four weeks.