You can add him to the 6 game retroactively as well so if he was out longer than expected, they still get that same cap relief.
The time line for the injury just makes no sense, even if they thought it was a 3-4 week thing.
(per Hodge on twitter):
09/15 -- Harris cleared to practice
09/16 -- Harris removes himself from practice
09/17 -- Harris moved to six-game injured list w/ "no timetable" for return
09/18 -- Cornelius starts vs. Winnipeg
09/24 -- Elizondo says Cornelius will start vs. Ottawa
09/25 -- Harris is healthy