Forward aiming to beat hamstring injury.
Sears was withdrawn at half time in the weekend game against Crawley Town with a tight hamstring and has been receiving treatment since then.
The former West Ham man aside, the U's have no major worries after the game at the Checkatrade.com Stadium on Saturday and will look to go one better than the 1-1 draw against Shrewsbury earlier in the season.
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U's: Walker, Cousins, Wilson, Olufemi, Sesay, Eastman, Okuounghae, Dickson, Eastmond, Bean, Sanderson, Gilbey, David Wright, Massey, Vose, Sears, Morrison, Bonne, Ibehre, Szmodics, Watt