Georgia coach Mark Richt said Thursday starting offensive tackle Kolton Houston is still ineligible because he continues to test positive for a banned performance-enhancing substance he was given for a shoulder surgery more than two years ago. If eligible, Houston would have been Georgia's No. 1 right tackle for Thursday's opening day of practice. Instead, Richt said Georgia must prepare to be without the third-year sophomore. Richt said Georgia's medical staff hopes the anabolic steroid, 19-norandrosterone, eventually will leave Houston's system.