The former Everton striker has retired on his 35th birthday.
Yakubu has advised his countryman Kelechi Iheanacho, who has been linked with Tottenham Hotspur and West Ham United during this window, to leave Manchester City.
The former Everton player has been helping out at National League side Boreham Wood.
Jason Roberts is pleased to see Yakubu has joined Reading.
It has been reported that Championship side Reading could be about to lure former Everton and Middlesbrough striker Yakubu back to England.
Well Middlesbrough have not learnt their lesson, Birmingham, Portsmouth, Reading and Swansea pulled off coups while Manchester City were buying flops. Ten years on what has changed about the January Transfer Window?
The pair struggled at Everton, but at new clubs Blackburn Rovers and Tottenham Hotspur they are flying- why the difference?
A fight with relegation beckons and it will be touch and go in May.