The current cold snap sweeping the country put paid to the Roots Hall fixture against the Pilgrims, providing United's weary squad with a respite from match action after a relentless schedule since the start of December.
The Shrimpers had endured a non-stop back-to-back programme of midweek-weekend games as they battled on in the league, FA Cup and Johnstone's Paint Trophy, taking in 15 games in 46 days.
But after Saturday's rest, Prosser is keen to put behind him the disappointment of defeat against Brentford last time out.
"I think one game (postponed) here and there is okay and to be honest it came at the right time for us," he told the club's official website.
"A lot of teams have seen their games fall foul to the weather over the Christmas period but we didn't so we've not had any rest.
"We have been fighting on three fronts recently so there's been a lot of games and a few tired legs, as well as injuries.
"We'll be all rested and ready for Saturday and that's a game we certainly don't want called off because we want to get back to winning ways."
- Sports & Recreation