The Colts waived Milligan on Friday.
Milligan has decided to opt out of the 2020 season, Joel A. Erickson of The Indianapolis Star reports.
Milligan (foot) was placed on injured reserve Wednesday.
Milligan (foot) was ruled out for the remainder of Monday's game against New Orleans, Andrew Walker of the Colts' official site reports.
Milligan (knee) isn't listed on the Wednesday's injury report.
Milligan (knee) is inactive for Sunday's game versus the Chiefs.
Milligan landed on the Colts' injury report as questionable ahead of Sunday's game against the Chiefs due to a knee injury.
Milligan was elevated to the Colts' 53-man roster Wednesday.
Milligan was signed to the Colts' active roster Wednesday, Andrew Walker of the team's official site reports.
Milligan was waived by the Colts on Friday.