The pair are nursing injuries and will play no part, but on-loan Manchester City defender Shaleum Logan is available again after completing a two-match ban.
He will battle it out with on-loan Leicester youngster Luke O'Neill for the right-back spot.
Striker Terry Gornell looks set to be missing due to mumps so long-term absentee Bas Savage should earn a place on the bench following his return to fitness.
Parry said: "We'll be looking to unleash Bas on Southampton at some point."
Watford striker Marvin Sordell gave Rovers a boost this weekend when he extended his loan spell by a further month.