Broadfoot joined the Millers in 2014 but recently had been plagued by a back injury which saw him make only 4 appearances last season.
Broadfoot joins Kilmarnock on a 3 year deal after both clubs agreed on a nominal fee for the 32 year old which is seemingly good news for the Millers as the big man was one of the bigger earners for the club and with the obvious injury concerns.
The big man made 64 appearances for the Millers.. All the best Kirky lad.