How long do you keep Devin Thomas and Malcolm Kelly if they don't produce?

[vallin21]

I keep them 2 years at the most. They need to learn the speed of the game, and being in the same offense (hopefully) will help them. With that said, both will have to stay healthy to contribute (especially Kelly). I expect big things from them this year, which is why I don't get why people want a declining Holt, when they have only been on the team for a year.