However, the Millers cannot afford to rest on their laurels and they must now further consolidate their spot in the second tier. They may need to strengthen their squad in order to do that but Championship talent rarely comes cheap.
With that in mind, here are 11 players out of contract this summer who may interest Rotherham.
1. Kevin Long
The experienced defender ended the 2022/23 campaign with Birmingham City. Photo: JOHN WALTON/POOL/AFP via Getty Images
2. Jordan Thorniley
The defender stood out for a struggling Blackpool last season. Photo: Gareth Copley/Getty Images
3. Tarique Fosu
Fosu is familiar with the Millers having spent time on loan at the club last season. Photo: Catherine Ivill/Getty Images
4. Harvey Knibbs
Knibbs is set to leave Cambridge United and has been linked with numerous Championship clubs. Photo: Stu Forster/Getty Images