He may now be a liability who needs to go.  From Yahoo.com’s Jason Cole…

…Harrison dropped two potential touchdown passes that could have made this game easy for the Colts – is critical to the remainder of Indianapolis’ season. If the 5-4 Colts are to make a serious run at and in the playoffs, Harrison has to be part of the solution.

Not an unmistakable problem.

Through nine games, Harrison has 30 receptions for 357 yards and three touchdowns, putting him on pace for the worst full season of his career.

The first drop was a potential 50-yarder from quarterback Peyton Manning when Harrison was all by himself in the middle of the field. The throw was short, but certainly catchable.

Yet all Harrison could do on the play was lunge at the ball with one hand, letting any chance for a score slip away. He didn’t slow down or chop step. He didn’t even dive for it. Why? Perhaps Harrison is afraid to put pressure on the knee that bothered him so much last year and forced him to miss 11 games.

And…

The other telling part of this game was that the Steelers primarily used second-year cornerback William Gay to cover Harrison. Gay is a fifth-round pick from Louisville who doesn’t regularly start. Gay got help from safety Tyrone Carter, another guy who makes his living primarily as a backup. This follows similar treatment Harrison received when Green Bay also used a backup cornerback on Harrison.

Over most of his career, Harrison has abused guys like Gay and Carter – spinning them like tops with his array of finely tuned moves. Now, teams like the Steelers are so brazen about their lack of respect for Harrison that they ran a defense on the second drop that basically forced the Colts to throw to Harrison. (Source)

One would think without a big play reciever the Colts will struggle to make a deep post season run.