Charnock began his career with Liverpool, and made his debut under Graeme Souness in November 1992 in a Cup Winners' Cup game against Apollon Limassol. Charnock was just 17 years and 9 months old, which made him the youngest player ever to play for the club in European competition, breaking a record previously set by Jamie Redknapp one year earlier. Despite this promising start, Charnock did not break into the first team at Anfield, instead he spent much of his time in the reserves and his only other appearance for the Reds was in a League Cup tie against Chesterfield that season. With the advent of squad numbers in the Premier League from the 1993–94 season onwards, Charnock was issued with the number 18 shirt – next worn by Michael Owen, who went on to be one of the club's most highly regarded players ever. He joined Blackpool on loan towards the end of the 1995–96 season, and made four substitute appearances for Sam Allardyce's "Tangerines".
Crewe Alexandra
In December 1996 he left Liverpool on a free transfer to sign for Crewe Alexandra, following a successful loan spell. He made 36 appearances in 1996–97, scoring his first senior goal on 20 December, in a 3–0 win over Notts County at Gresty Road. He also featured in the play-off final, as Alex beat Brentford 1–0 at Wembley to win promotion out of the Second Division; he was replaced by Chris Lightfoot on 65 minutes. He made 35 appearances in 1997–98, as Crewe finished in the top half of the First Division. He played 50 games in 1998–99, as the "Railwaymen" again retained their second tier status. He played 21 times at the start of the 1999–2000 campaign, but did not feature past November. He made nine league appearances towards the end of the 2000–01 season and featured 26 times in 2001–02, but was released in April 2002, after manager Dario Gradi informed him he did not feature in his first team plans.
Later career
He moved on to nearby Port Vale in August 2002. He featured 24 times for Brian Horton's "Valiants" in 2002–03, before he was released from Vale Park in May 2003. He joined Bury in August 2003, but played just three Third Division games for Andy Preece's "Shakers" in 2003–04 in a brief stay at Gigg Lane. In September 2003 he moved to Northern Ireland to play for Linfield. His new club won the IFA Premiership title in 2003–04 and finished second in 2004–05. In October 2005 he joined Ballymena United on a short-term contract, which was extended after some good performances. He suffered with injury at both Irish clubs, missing a whole year of action, and he returned to England in summer 2006, joining Fleetwood Town of the Northern Premier League Premier Division. A year later, Charnock signed for Conference North team Leigh RMI. He played just 12 games, as Leigh finished bottom of the league in 2007–08, and were thus relegated. He signed for Mossley in July 2008. He made just five appearances for the Northern Premier League club in 2008–09, before injuries curtailed his career completely.
Statistics
Source:
Honours
;Crewe Alexandra
Football League Second Division play-off winner: 1997
