Brissett was hurt early in the second quarter. He was able to get off the field under his own power and is being looked at by trainers on the sidelines.
The Colts were driving in the last minutes of Sunday's down against the Pittsburgh Steelers, supported by a less than ideal pass impedance call against Steven Nelson. The only big mistake Hoyer made Sunday was his second quarter interception to Steelers safety Minkah Fitzpatrick that Fitzpatrick returned 96 yards for a score. Those were Hoyer's first touchdown passes since he threw one against the Colts in Week 5 of the 2017 season while he was with the San Francisco 49ers.
It was a game of ups and downs for the Steelers offense. Later, Leonard had a late hit on Smith-Schuster, which helped lead to a McDonald touchdown catch in the third quarter.
Brian Hoyer replaced Brissett at quarterback. Considering what his team has endured during the first half of a wildly uneven season, it was hard to blame him.
Best tackle: Indianapolis defensive end Jabaal Sheard fought off Matt Feiler and stopped Smith-Schuster for no gain on a fourth-and-2 pass in the second quarter.
The diagnosis does not come as a surprise, as the Colts suspected following Sunday's game that Brissett's knee injury was minor. It's the third block attempt for Fitzpatrick in two games after their two-pick execution against the Miami Dolphins seven days back.
The Steelers now must regroup, get healthy and finish up their three-game homestand with a tough one against the Los Angeles Rams.