Leyton Orient CEO Alessandro Angelieri has confirmed player-manager Kevin Nolan has stepped down.
The club have appointed Andy Hessenthaler as interim manager until the end of the season.
Angelieri said: "Everyone at the club is fighting hard to make sure we reach the play-offs this season. Whilst that aim remains within reach, we have decided that Kevin should focus entirely on his playing contribution until the end of the season.
"We believe that Kevin will be able to make a bigger impact on the team without the distraction of managerial duties. Andy Hessenthaler, who has been assisting Kevin over the past few months, will take charge of the first team in the interim."