Positive thinking and fixing his mechanics helped him shine in his last three starts in Spring Training and earn a spot in the rotation.
Williams is looking to have his best season since 2003 when he was a rookie with the Giants. Williams will face the Diamondbacks for the ninth time in his career. He is 4-3 with a 3.24 ERA against them.
WSH: RHP Jerome Williams (0-2, 7.30 ERA in 2006)
Williams is looking to pick up his first win since the 2005 season, when he was with the Cubs.
ARI: Micah Owings (0-0, 0.00 ERA)
Owings will be making his Major League debut against the Nationals.
Now batting in the sixth spot in the lineup, catcher Brian Schneider, is tied for the team lead in RBIs with four.
WSH: MASN On radio
WSH: WTWP 1500 Up next
Saturday: Arizona (Brandon Webb, 0-0, 9.00) at Washington (John Patterson, 0-1, 14.73), 7:05 p.m. ET
Sunday: Arizona (Livan Hernandez, 0-1, 7.20) at Washington (Shawn Hill, 0-1, 7.20), 1:35 p.m. ET
Tuesday: Washington (Matt Chico, 0-0, 13.50) at Atlanta (Tim Hudson, 0-0, 1.29), 1:35 p.m. ET
Bill Ladson is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.