a.j. francis

What's the evaluation on DT A.J. Francis? He looked VERY disruptive vs the Texans. Looked almost like a starter. Is there room for him on the Dolphins 53? If so, who would he replace? :confused: http://espn.go.com/blog/afceast/post/_/id/62994/miami-dolphins-stock-watch-5 "...3. A.J. Francis...