The Kansas City Chiefs have had the same three names on the injury report all week.
S Reshard Langford was listed as doubtful with an ankle injury, which means there is a very good chance he wouldn't be playing. Langford is a reserve safety.
The Chiefs made it official. He's out. Josh Looney of KCChiefs.com says he didn't travel with the team to Indy.
That sounds like Jackson and O'Callaghan did make the trip to Indy so I suppose that suggests they have a good shot at playing. Jackson hasn't played since coming out in Week 1 against the San Diego Chargers. O'Callaghan hasn't played at all this season.
Here's the evolution of the injury report for Colts week: