The injury occurred during practice earlier this week. Coach John Harbaugh confirmed that the fourth-round pick from Virginia was lost for the year.
Harbaugh says, "It's a clean tear. That's the positive."
Urban is no stranger to injury. He tore the ACL of his left knee before and had a bad ankle injury during his senior year at Virginia.
This injury occurred when Urban was trying to shake off a block.
Harbaugh says, "His knee just buckled on him."
The 6-foot-6, 298-pound Urban signed a four-year, $2.52 million contract in May that includes a signing bonus in excess of $300,000.