Matt Wieters exploded for four hits, including a three-run homer, and six RBI as the Orioles steamrolled the Nationals 12-3 on Saturday. Wilson Betemit, Adam Jones and Wieters combined to go 10-for-10 from the three, four and five spots in the order. Wieters, who had been just 4-for-31 this spring, is expected to open the season batting fifth behind Jones, though it will usually be Nick Markakis in the three hole.