Chaplow has been suffering from a groin injury related to the double hernia operation he underwent in November.
He returned to full fitness last week but missed the 3-0 home win over Cardiff to attend the birth of his second child.
Paul Coutts was sent off against the Bluebirds and now serves a one-match ban, so Chaplow is poised to replace him in the centre of midfield.
On-loan Manchester United youngster Matt James is hoping to be passed fit after an Achilles strain but fellow Old Trafford loanee Danny Welbeck could remain sidelined with a knee injury.
Skipper Callum Davidson could feature after recovering from head and muscle injuries.