Coventry have signed Mark Marshall on a contract until June, following the completion of his two-year drugs ban.
The 26-year-old midfielder tested positive for a banned stimulant after a League Two game between Barnet and Dagenham on Boxing Day 2011.
The ban was imposed the following May and he was released by Barnet three weeks later, having played 84 games for the club and scoring 10 goals.
He had been training with the club over the past week, and terms were agreed on a 6 month contract today.
Speaking on the club' website, Manager Steven Pressley was very pleased with the signing : "He has very much impressed us, not only with his ability but his hunger as well. Mark's fitness is also very good so we expect him to challenge for a starting spot straight away."
Marshall said he was delighted to be back in the game, and added: "I can't wait until that first moment when I get back on the pitch. It is going to be an unbelievable feeling and hopefully I will be able to make an impact at the club."
"When a club like this comes knocking, you can't turn it down."
Coventry are currently 12th in League One, there last match a 2-0 defeat to promotion chasing Leyton Orient.