The game is to be screened LIVE on SKY SPORTS EXTRA tonight and it will be Rangers' first taste of playing in front of the cameras since the playoff final defeat in Cardiff last May.
Rowlands has a tight hamstring and maybe rested given the fact that new signings Arthur Gnohere and Richard Johnson are both in the squad to face the Posh.
Jamie Cureton is also battling for his first start in Rangers colors but is more likely to start from the bench.
Ollie will debate with his management whether to stay with Matthew Rose and Clarke Carlisle in the heart of defence or give Gnohere is home debut since signing permanently (after a successful loan spell earlier in the season).
Johnson may also start in the centre of midfield if Ollie drops Stevie Palmer. Up front the selection dilemma continues.
Kevin Gallen is likely to partner Paul Furlong again but Tony Thorpe is pushing for a place despite a niggling injury that kept him out of the derby clash against Brentford last week.
Kevin McLeod is to return after a stomach bug kept him out of the game at Brentford. Chris Day will keep his place in goal.
Posh's form away from home has been sub-standard and Rangers' home from has been excellent but who knows what may happen in front of the cameras tonight as the R's could go top on goal-difference until tomorrow when Bristol City and Plymouth are both in action.
Come on U R's