Former Manchester United winger King missed the 3-2 loss to Birmingham because of a back strain but is expected to train on Tuesday while long-serving midfielder Dunn (hamstring) has a slight strain and could return.
Dunn's comeback in the middle of midfield would be particularly welcome for a Rovers side who will be without Jason Lowe after he picked up a fifth caution of the season right before the Football League's amnesty.
Full-back Todd Kane (thigh) will miss out while Corry Evans (ankle) is still considered a couple of weeks away from returning, meaning he will remain absent along with Paul Robinson (back) and Dickson Etuhu (ankle).
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