EJ Manuel on practice field Thursday

ORCHARD PARK, N.Y. -- Buffalo Bills quarterback EJ Manuel (knee) participated in the start of Thursday's practice.

However, his participation beyond the period open to reporters was unclear. Coach Doug Marrone will release the injury report at approximately 1:30 p.m. ET.

The Bills did not practice Wednesday, but the team listed Manuel as a limited participant on its estimated injury report.

Manuel missed last Sunday's win over the Miami Dolphins with swelling in his left knee.