Rovers could potentially move into the top two with a win and a couple of results going their way.
Here's our guide to the game...
STATE OF PLAY
Rovers have reason to be confident going into this fixture, having won four league games in a row prior to the FA Cup draw with Crewe Alexandra last weekend. Both Mowbray and captain Charlie Mulgrew collected their monthly awards for a strong November showing and confidence in the camp is high. This will be Rovers first trip to the ABAX Stadium in five years - the last of which resulted in a 1-4 away win with Jordan Rhodes hitting a hat-trick. In fact, Rovers have scored at least four goals in two of their last three games against the Posh. Kick-off against Peterborough is scheduled for 3.00pm on Saturday, and fans can follow the action via our official Twitter account, with highlights available for iFollow subscribers after the game.
Mowbray will be without midfield pair Rekeem Harper and Elliott Bennett, who are out for one and four games respectively. However, the boss will be boosted by the possible return to action of Craig Conway, who will travel down to Cambridgeshire with the team. Ben Gladwin is still out with a knee injury and the game comes too soon for defender Darragh Lenihan to make his return to action. Harry Chapman is another who's out until 2018.
Struggling for any real consistency in the league this term, Peterborough currently sit a place and six points outside the play-off places, but will have been boosted by a midweek Checkatrade Trophy win against Southend last time out. The Posh picked up a couple of injuries in that game and ended it with nine men after defender Ryan Tafazoli and winger Leo Da Silva Lopes were forced off after all substitutions were made. Tony Mowbray has earmarked wingers Gwion Edwards and Marcus Maddison as two men who will have to be watched closely at the weekend. Manager Grant McCann spent five years as a Peterborough player and is into his second season in charge of the club.
SHARE YOUR FAN PICS
Rovers will be roared on by over 1,200 supporters for this match. If you're heading to Peterborough on Saturday, be sure to tag your matchday pictures with #Rovers! We'll share the best posts on our official Twitter and Instagram pages.
It's a full fixture list in League One tomorrow, with the following games: Blackpool v Rotherham, Bradford v Rochdale, Bristol Rovers v Southend United, Bury v AFC Wimbledon, Charlton Athletic v Portsmouth, MK Dons v Shrewsbury, Oldham v Northampton, Oxford United v Doncaster, Peterborough v Rovers, Plymouth v Gillingham, Walsall v Scunthorpe, Wigan v Fleetwood