Brady missed practice Wednesday for what the team called a non-injury related issue, then was a limited participant on Thursday with a left shoulder injury.
That followed reports that Brady had X-rays taken on the shoulder that turned out to be negative.
If some measure of mystery has surrounded Brady's status this week, Patriots coach Bill Belichick wasn't interested in clearing things up Friday, dodging questions about his quarterback in a familiar fashion.
Belichick's response to what Brady was able to do in practice was: "Play quarterback -- the usual thing."
Asked if Brady was injured during the week, the coach said: "I think we covered that. I think we've already talked about that."
Brady has passed for 4,897 yards this season, second in the NFL to the Saints' Drew Brees, who broke Dan Marino's single-season record on Monday.
Brees has 5,087 yards passing, three more than the previous record of 5,084 set by Marino in 1984. Needing fewer than 200 yards, Brady is also likely to beat the old mark this week.