In a keeper or dynasty league, you can't trade Caddy, but in a redraft I think now is a great time to sell. Odds are he doesn't get 100+ rushing yards in all of his games, so his trade value will drop. Throw in that college backs usually tire in the second half due to being used to 10 game schedules, and Caddy's already intense workload, coupled with the fact that he split carries in college. Yeah, he's going to either be used less or slow down, either way, his fantasy value will drop. See if you can pry away Priest Holmes, Edge, or better for him.