Luck still hasn't practice since undergoing shoulder surgery in January, and no one in the Colts organization sounds sure about when he might return.
"I would say, again, the odds are most likely he probably won't open up against the Rams", Irsay said, "but let me be clear about it - in our minds it's something that we haven't ruled out". But the Colts still resisted the temptation of adding another veteran player to push backup QB Scott Tolzien in the offseason.
Brissett, depending on how quickly he picks up offensive coordinator Rob Chudzinski's offense, should push Tolzien and Stephen Morris for snaps until Luck returns.
Otherwise, the Colts quarterback would have been out for at least the first 6 weeks of the regular season, whereas now Luck can practice with his teammates immediately and potentially start much sooner.
Luck has been on the PUP list since training Camp started at the end of July.
That changed just eight days before the start of the regular season. Time is running out for him to be ready to face the Los Angeles Rams in Week 1, and there is a growing concern that he could miss multiple games. Brissett was 34-of-55 for 400 yards with no touchdowns, and he was sacked six times while going 1-1 as a starter last season.