Washington Mystics all-star forward Elena Delle Donne is expected to miss two to three weeks with an injured left thumb, Mike Thibault, the team's coach and general manager, announced Tuesday. The injury is the latest blow to a club that already has lost another starter for the season. Delle Donne, the Mystics' leading scorer (18.8 points per game) tore the ulnar collateral ligament in her non-shooting hand during the first quarter of the Mystics' game Saturday against the Atlanta Dream. The 2015 WNBA MVP is scheduled for surgery either today or Thursday and will wear a soft cast for approximately one week. After the cast is removed, Delle Donne will begin physical therapy and wear a protective splint during which time she may begin testing how much contact her thumb and hand are able to withstand.