Midfielder Porter saw red after just four minutes of last weekend's crunch clash at Bury but the relegation-threatened U's rallied from then going a goal behind to triumph 2-1 at Gigg Lane and claim three crucial points.
Jabo Ibehre has now completed a three-match ban and returns to contention while fellow influential striker Freddie Sears stands a chance of recovering from the knee injury which has kept him on the sidelines of late.
Right-back Brian Wilson missed the clash at Bury due to illness but is expected to return while the likes of Billy Clifford, Sam Walker, Magnus Okuonghae - each of whom played despite themselves struggling with the virus - have also regained full health.
Defender Tom Eastman is again likely to miss out due to injury.
