The custodians have both put pen to paper to stay at the club next season after being offered new deals last week.
After agreeing a one year deal, Andy Marshall, whose home shirt is sponsored by Covsupport News Service told the club website: "I have really enjoyed my time with Coventry City. "It's a great Club and I feel that we have the potential to progress, especially under the new regime.
"This season has been difficult for a number of reasons, but I firmly believe that good times are ahead and I am looking forward to working with everyone at the Club for another year."
This leaves Marcus Hall and Stephen Hughes who are yet to be offered new deals.
Coventry kid Hall came through the ranks and was sold to Stoke before rejoining. He has been left out of the team lately following the signing of Danny Fox and Scott Dann but Chris Coleman said that he wants Hall as part of his plans for next season.
Stephen Hughes is still waiting to speak to the club about a new deal. The midfielder is coming to the end of a four year deal with the Sky Blues and like Hall, is keen to get his Sky Blues future sorted at the earliest opportunity.