I wouldn't. I'd rather have power backs like Battle and Greene to pick up a sure yard or two than Drey who would most likely lose yardage. Our WRs also have injury issues. Britt and Hunter both are still recovering from those torn ACL's. Nate has been banged up a lot and usually misses some time here and there. Mariani would provide better and more needed depth at WR than Drey would at RB. I could also see us keeping 3 RBs, and 6 WRs, one of them being Mariani. Preston or Williams would get the boot as a result. Slim chance we keep 4 RBs, 6 WRs, no Mariani. But I suppose it's possible.