Defender misses Coventry trip.
U's: Parish, Barnes, Vincent-Young, Brindley, Shorey, Kent, Harney, Eastman, Gilbey, Garvan, Edwards, Lapslie, Ambrose, Moncur, Wright, Massey, Lee, Bonne, PorterThe U's are also without Leo's fellow defenders George Elokobi, Matt Briggs and Alex Wynter as they look to make it back to back victories and keep in touch with the sides above them in the League One table.
The centre half came off injured in the early stages of the weekend win over Doncaster Rovers and the game at the Ricoh Arena has come too soon for him to travel to the Midlands.
Colchester United will be without loanee defender Leo Chambers for the trip to Coventry City.