It's Rickie Weeks... of course he can't be trusted.
Best case scenario he puts up a 25/25 season, which would obviously be huge, no matter what the average.
Worst case scenario, you fight with him being day-to-day for the better part of three months and his .230 average absolutely f'ing kills your team and makes you want to stab him in the face with a shovel.
When you strap into a roller-coaster and it clicks all the way up to the top, you don't really expect it to stay there, do you?
Either get your hands up in the air and enjoy the ride, or close your eyes and hang on for dear life. Don't be the sissy that wants to get off when the ride is already going.