Sean Jones has the most fantasy value out of this bunch. Some are projecting him as a top 25 DB. I'm not as high on him, however. Tampa plays a lot of Tampa-2 which means Jones will be playing deep zone coverage 15-20 yards away from the line of scrimmage and with a solid front seven, it will be difficult for Jones to put up the tackle numbers for that top of projection. I currently have him ranked #48 in my DB redraft rankings.
I doubt Phillips or Dahl stay starters very long. Dahl is just filling in for James Butler until he recovers from a MCL sprain and Phillips is starting by default.