Kerr was on the substitutes' bench for last week's home defeat to Torquay following a one-game ban, but is pushing for a recall, and Paddy McLaughlin is another midfielder ready to stake his claim.
Mills, who has no new injury or suspension problems, is also pondering changes in his defence but has limited options with Dave McGurk yet to appear for the Minstermen this season and fellow centre-half Clarke Carlisle recently departing for Northampton, so Chris Smith and Chris Doig could resume their partnership.
Strikers Ashley Chambers and Jason Walker stepped off the bench last week and are in contention for recalls, while midfielder John McReady has not recovered full-match fitness following his dislocated shoulder.
Forward Michael Coulson is out for the rest of the season due to knee ligament damage.
Rochdale have no injury or suspension worries.
Reece Gray and Matt Edwards are boss John Coleman's only two long-term injury victims and remain on the sidelines.
Forward Gray suffered a dislocated ankle, a fractured fibula and a snapped medial ligament during a behind-closed-doors friendly back in August, while goalkeeper Edwards has undergone surgery on a broken wrist.
But Coleman can call on every other member of his squad as Dale look steal a march on their League Two rivals, the majority of whom are not in league action this weekend due to the second round of the FA Cup.
Dale are currently one point and a single place outside the play-off places with a game in hand on the seven teams above them.
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