After the game, coach Mike Tomlin said Haden sustained the injury high up on his fibula.
Backup Scott Tolzien, who started the team's season opener and threw a pair of pick-sixes in a losing effort, would be the team's next man up if Brissett can't play.
Roethlisberger found JuJu Smith-Schuster on a 7-yard TD pass midway through the third quarter to make it 17-9. The extra point was blocked. The 2-point conversion pass tied the score at 17 with 11:52 to go.
Colts: Indy had four first downs and 99 yards of offense in the second half, 61 of those yards coming on the TD pass to Rogers.
Ben Roethlisberger's 32-yard completion to Antonio Brown with 35 seconds set up a 33-yard field goal from Chris Boswell as time expired Sunday, giving Pittsburgh a 20-17 come-from-behind win at Lucas Oil Stadium. Pittsburgh has won in Indianapolis two consecutive seasons. Brissett was 14 of 24 for 222 yards with two TDs and one interception.
Haden has been an integral part of the Steelers' defensive revival in 2017.
After the game, the Colts announced Brissett "developed symptoms after the game" and was now in the concussion protocol.