Like so many have already said, McKissic fits our offense and is very effective if we use him in plays that are designed to compliment his strengths. Prosise, in spite of all his potential to be a super star player, I'm afraid that his body is just not able to condition up enough to withstand the abuse that RBs are confronted with each and every time they get the ball.
C.J. can do some amazing things athletically. I would go so far as keep him on the roster until they can put his present health to the test. Right now they have to play with less contact than most flag football players do. I worry that C.J. is going to be one of those, "could have been a contender" stories at the end of the day. I think that the same thing happen to Thomas Rawls. His bone structure and ability to withstand abuse, betrayed him time and again.
I kind of hated to see us, miss the boat on Williams again this year. I thought letting him go to begin with was a mistake. I guess he has a hard time memorizing the play book and runs off queue at times, but he's got magnetic hands and can come up with the ball in scenarios where other receivers don't even have a chance.
Anyway if it comes down to pick and choose time, I vote we give Prosise his walking papers and keep McKissic.
Go Seahawks!