Washington Nationals outfielder Bryce Harper was scheduled to begin his rehab assignment on Monday with Class A Potomac. The 21-year-old Harper will play at least two games for Potomac and then be re-evaluated. He will be playing all three outfield positions during his rehab assignment. The 2012 NL Rookie of the Year was hitting .289 with one home run and nine RBIs in 22 games this season before injuring his thumb on a headfirst slide into third base. He was put on the disabled list on April 27 and had ligament surgery two days later.