I'm wondering how much the churn at MLB this year contributes to their run/pass defense at RB. Kirksey, Martin, and Barnes are all individually skilled. But between the three, they've hardly played consistently together even through game 11. Throw in Greene, and that is another variation in the group. Barnes: Games 1-8 Kirksey: Games 1-3, 10-12 Martin: Games 7-8, 10-12 Greene: Games 2-4, 6-7, 9-12