Veteran defender Davis has served a one-match ban following his calamitous Millers debut where he received a red card and gave away a penalty in a 3-1 defeat to Bristol Rovers.
Midfielder Frecklington also missed last week's 3-1 win over Northampton with an ankle injury, but he is fit again and will return to Steve Evans' squad.
David Noble (ankle) and Michael O'Connor (groin) both picked up knocks during that success over the Cobblers but have trained all week and should be okay.
That leaves Craig Morgan (foot) and Scott Shearer (elbow) as the only occupants of the treatment room, but they are close to fitness.
Ian Sharps, who is at the Brewers on loan until the end of the season, is unable to play for the hosts.
The Millers will go above Burton in the table with a win, which would be their sixth successive npower League Two away victory.