FOXBORO — The Patriots had perfect attendance inside Gillette Stadium on Friday as they continued preparations for their AFC championship showdown with the Ravens Sunday evening in Foxboro.

Rob Gronkowski was placed on season-ending injured reserve on Thursday with a broken left arm, leaving the Patriots roster at 52 players. All 52 were bundled up in heavy sweats and shells on Friday on a bitterly cold but sunny day at Gillette.

The Patriots listed only Chandler Jones (ankle) as limited in practice on Thursday, with the remaining 51 players fully participating.

For more Patriots news, visit the team page at weei.com/patriots. WEEI-FM 93.7 will broadcast the AFC championship game between the Patriots and Ravens on Sunday at 6:30 p.m.