I think Lumpkin is the #5 RB and gets cut... keep Wynn if they go with four. My least one has them going with three and keeping Kuhn instead. he had more to ST than any of the RBs and can be a power RB as well and has done it in the red zone.
Meredith has shown nothing... they may keep him because he's a draft pick and someone needs to back-up Clifton... but Dietrich-Smith is clearly better at the moment.
I cut Havner for OLB Jones... Havner can help more now... but come on Jones has a ton of potential and was VERY good on ST in college which is basically the only thing Havner gives as he's under average at LB and TE. Jones at least has the potential to be a good LB one day unlike Havner.
Yeah Bush and Rouse haven't shown anything... IR Rouse (or trade) and keep Bush if he adds anything to ST. If not cut or trade him. Keep Underwood for Rouse position.
Depending on Lee's health don't IR him and cut Porter. If he's really injured then IR him and keep Porter.