Jul 06, 2008 7:21 PM EST

Nationals' outfielder Elijah Dukes will miss 4-6 weeks of action after suffering a knee injury on Saturday night, according to USA Today.

Dukes tore cartilage and partially tore a tendon in his right knee while slamming into the left-field wall after catching a fly ball.

Dukes will have surgery on Monday.

Via USA Today