I expect Randall to compete with Hayward for the starting job opposite of Shields. Rollins will most likely get snaps playing in the slot, possibly taking over Hyde as the nickel CB. Montgomery will be the primary kickoff returner and maybe get some touches on screens or out of the backfield.
I agree with RRyder that Ryan will probably get most snaps out of this year´s rookie class, hopefully he´s able to make a decent impact as a rookie. I don´t expect anything out of Hundley (still have a hard time understanding giving up two picks to select him). Ripkowski could have an impact as a special teamer while Ringo may provide some inside pass rush in subpackages. Backman´s playing time will depend on what happens with Quarless down the road.
The undrafted rookies with the best chance to make the team include John Crockett, LaDarius Gunter, Matt Rotheram and James Vaughters IMO.