According to Mark Maske of the Washington Post, Brady said he was "out there" for practice Friday despite an injury to his throwing hand, and added, "We'll see," with regard to whether he'll play Sunday.
Brady has been seen wearing gloves on both hands at practice after being involved in a "minor collision" with a teammate during Wednesday's practice, per ESPN.com's Mike Reiss.
One source told Reiss that Brady "should be OK" for Sunday's game, while another told him the injury "could affect [Brady] slightly."
Per ESPN's Adam Schefter, Brady wore gloves on both hands while addressing the media Friday.
Brady hasn't missed a game due to injury since suffering a torn ACL in the 2008 regular-season opener.
Although he is 40 years old, Brady is a leading MVP candidate after throwing for 4,577 yards, 32 touchdowns and eight interceptions during the regular season.
In last week's 35-14 AFC Divisional Round win over the Tennessee Titans, Brady threw for 337 yards and three scores.
Brady's hand will be worth monitoring Sunday if he plays since the Jaguars ranked second in the league during the regular season with 55 sacks.
If Brady either can't start or finish Sunday's game, New England's backup is Brian Hoyer, who was signed after the Pats traded Jimmy Garoppolo to the San Francisco 49ers.