Raya needs reconstructive surgery on the injury he suffered against West Brom, which looks set to be delayed until the summer, but has returned to training with a protective mask on and could play.
Midfielder Corry Evans will serve a one-match ban for picking up five yellow cards.
Defender Charlie Mulgrew, who has been called up by Scotland, is still struggling with a rib injury, so may not be included against the Millers.
Rotherham will be without midfielder Will Vaulks.
Vaulks is serving a one-match ban due to five yellow cards, but might have been a concern for the game anyway with a hip problem.
Matty Palmer or Ben Wiles will battle it out to replace the vice-captain in the starting XI.
Defender Sean Raggett (ankle) has returned to training but is still a couple of weeks away, while midfielder Darren Potter (Achilles) is a long-term absentee.
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