Buckner (ankle) had his initial X-rays come back negative and his injury is considered to be a sprain, Joel A. Erickson of The Indianapolis Star reports.
Pierce secured five of seven targets for 56 yards and a touchdown in the Colts' 16-10 loss to the Packers on Sunday.
Pittman brought in three of seven targets for 21 yards in the Colts' 16-10 loss to the Packers on Sunday.
Taylor rushed 12 times for 103 yards and brought in two of four targets for 32 yards in the Colts' 16-10 loss to the Packers on Sunday. He also committed a fumble recovered by Indianapolis.
Gay made his only extra-point try but failed to convert one of his two field goal attempts in Sunday's 16-10 loss to the Packers.
Richardson completed 17 of 34 passes for 204 yards with one touchdown and three interceptions and added four carries for 37 yards in the Colts' 16-10 loss to the Packers on Sunday. He also committed two fumbles that he recovered.
Buckner (ankle) is out for the rest of Sunday's game at Green Bay, James Boyd of The Athletic reports.
Latu (hip) is out for the rest of Sunday's game against the Packers, Nate Atkins of The Indianapolis Star reports.