Argentinian duo Agustin Battipiedi and Cristian Baz are in line to make their Brighton debuts in the Carling Cup clash at Northampton.
The midfielders, both signed during the summer, were unused substitutes during Saturday's win at Swindon and Seagulls boss Gus Poyet wants to give them a taste of English football at Sixfields.
Skipper Gordon Greer and striker Glenn Murray miss out again as they serve the final game of their suspensions carried over from last season.
Defender Lewis Dunk is still out with a foot injury and goalkeeper Peter Brezovan is sidelined with a fractured wrist.
Casper Ankergren started in goal at the County Ground but Michael Poke could be given an outing in the cup.