Penny (hamstring) practiced fully Thursday, John Boyle of the Seahawks' official site reports.
One day removed from Travis Homer (calf) being listed as full on the Seahawks' practice estimate, Penny put in a full on-field session himself Thursday. With Chris Carson (neck) out for the season, Alex Collins (abdomen) has been the team's running back most likely to receive touches on a weekly basis. Behind Collins, though, Penny, Homer and DeeJay Dallas are healthy, while Adrian Peterson and undrafted rookie Josh Johnson are on the practice squad. It remains to be seen who among those five may be the No. 2 RB on Sunday against the 49ers.