Westwood who has been in fine form this season and is a front runner for the Player of the Year award will miss games against Port Vale, Morcambe and Cheltenham Town.
Carl Martin will be sitting out his final match against Port Vale but could up for selection against Morcambe on Good Friday.
Chris Stokes will miss the trip to Vale park after the on loan Bolton defender picked up a hamstring injury in the 1-0 defeat to Notts County, James Bailey picked up an eye injury in the same match but has returned to light training and should be fit.
Leading scorer Calvin Zola is still rated 50/50 for the Vale clash and boss Dario Gradi is checking daily to how the former Tranmere Rovers striker is progressing with his ankle.
Byron Moore is still ruled out with an ankle ligament injury picked up in the 1-1 draw against Torquay United and is still at least 3 weeks away from making a comeback.