The Green Bay Packers' uncertainties at outside linebacker were on display Wednesday when they took the practice field for the first time since arriving in Dallas for Super Bowl XLV. Frank Zombo, a rookie starter who has missed six games because of a knee injury, was a full participant in the session at Highland Park High School's indoor facility and hopes to play Sunday against the Pittsburgh Steelers in Arlington, Texas. Erik Walden, who replaced Zombo in the starting lineup but sustained an ankle injury in the NFC Championship Game victory over the Chicago Bears, was limited. Zombo, a free agent who broke into the lineup in Week 8 after four linebackers went on injured reserve, returned to practice Friday. He suffered a sprained right knee in the Week 14 loss to the Detroit Lions. Source: NFL.com
