Midfielder Sparrow has completed a three-match ban after he was sent off against Leicester earlier this month.
On-loan full-backs Mattock and Reyes missed Sunday's 6-1 FA Cup defeat at Liverpool as they were cup-tied.
Liam Bridcutt, who scored two own-goals at Anfield, is expected to shake off a minor back knock to continue in central midfield.
Defender Tommy Elphick remains sidelined with an Achilles injury and midfielder Gary Dicker is still recovering from a broken leg but the Seagulls have an otherwise fully-fit squad.
Striker Craig Mackail-Smith is pushing for a recall after dropping to the bench against the Reds.