Addai left last week's loss to the Kansas City Chiefs in the first quarter after hurting his hamstring. Castonzo missed that game with a sprained ankle. Nevis has been battling a back injury.
When Addai went out last week, rookie Delone Carter got more playing time. Indy could also increase the playing time of 2009 first-round pick Donald Brown.
The Colts also have announced that Tom Zupancic, senior vice president of sales and marketing, has retired. Zupancic first joined Indy as a part-time strength coach in 1984.
Copyright 2011 by The Associated Press