Playing in the Premier League is no mean feat and only a fraction of upcoming footballers actually end up featuring in the top flight.
Chelsea are a club who have a history of blooding young players through and handing them opportunities in the first-team, especially in recent years since the 2019 transfer embargo. However, the Blues can also be busy in the market and sign players to improve their squad.
While some go on to have lengthy careers at Stamford Bridge, others often fail to impress and don't spend much time in the senior set-up at the club. So, with that in mind, here is a look at the 21 players who have just made one Premier League appearance for Chelsea.
