Despite the injury problems that may keep him out until September, Nathan Tyson is the favourite with most bookmakers.
The ex-Wycombe man is a best price 12/1.
Grant Holt and Junior Agogo, also injury worries for the start of the season are both best-priced at 22/1.
Scott Dobie, currently the only one of the quartet to be fully-fit, can be backed at 50/1.