Kevin Sinfield retires: Former Leeds Rhinos and England captain to retire from all rugby at end of the season

35-year-old Sinfield, who currently plays for Leeds Carnegie, will retire despite having one year left to run on his contract

Kevin Sinfield will retire from all forms of rugby at the end of the season (Getty)

Kevin Sinfield has announced that he will retire from all forms of rugby at the end of the current rugby union season in May.

The former Leeds and England rugby league captain, who turns 36 in September, switched codes with the Rhinos' sister club Yorkshire Carnegie last November and had another 12 months left on his contract.

However, Sinfield announced at a press conference at Headingley on Wednesday his intention to hang up his boots after receiving several job offers.

Sinfield said: "I have been privileged and deeply honoured to have enjoyed a 20-year career as a professional rugby player and to retire on my own terms rather than through injury is something I feel lucky to be able to do.

Kevin Sinfield in training with Yorkshire Carnegie (Getty Images)

"I have always said that some day I will need to get a proper job and that day has now come.

"I have thoroughly enjoyed the last seven months with Yorkshire Carnegie and I would like to thank the coaches, players and supporters for making me feel so welcome.

He is a natural winner and that attitude and drive will be more important than ever for us as we head into the play-offs

&#13; <p>Bryan Redpath</p>&#13;

"I have always given total commitment to every team I have ever played in and, therefore, I have decided to hang up my boots at the end of this season.

"A number of opportunities have become available to me for life after rugby and I need to make the right decision for me and my family.

"However, before then we have got hopefully four massive games ahead of us, starting this Sunday against a very good Doncaster side at Headingley Carnegie."

Sinfield took up his new sport after guiding the Rhinos to a domestic treble at Old Trafford in October.

&#13; Sinfield (right) alongside Danny McGuire after last season's Super League Grand Final win&#13;

Yorkshire Carnegie head coach Bryan Redpath said: "It has been great to have Kevin involved in our squad this season, especially for the large number of young players we have in our group.

"He is a total professional and the example he sets is something that all young players can aspire to. He has had an incredible career in rugby league and it has been great for us to have him finish his career as a Yorkshire Carnegie player.

"He is a natural winner and that attitude and drive will be more important than ever for us as we head into the play-offs looking to book our return to the Aviva Premiership."

Despite missing the start of the season, Sinfield is the leading scorer for Carnegie with 177 points in his 14 appearances so far. He helped the team reach the final of the B&I Cup and a third-place finish in the Greene King IPA Championship.

&#13; Sinfield scored 3,967 points from 521 appearances for Leeds (Getty)&#13; (2015 Getty Images)

Carnegie will play Doncaster in a two-legged semi-final, with the aggregate winners progressing to the two-legged final to contest the right for promotion to the Aviva Premiership.

Sinfield will be hoping to bow out of rugby union on a high, just as he did in rugby league, in which he left an indelible mark.

In his glittering 19-season professional career in rugby league, Sinfield led Leeds to seven Grand Final victories, back-to-back Challenge Cup triumphs and three World Club Challenge successes.

He scored 3,967 points from 521 appearances for Leeds and won 40 caps for England and Great Britain, captaining his country in the 2013 World Cup, while his career total of 4,231 points, from 569 matches, put him third in the all-time list, behind Neil Fox and Jim Sullivan.

&#13; Sinfield finished second in the BBC Sports Personality of the Year award &#13; (PA)

Sinfield, who won the 2012 Golden Boot - the award for the world's best rugby league player - remains England's highest points scorer and currently holds the Super League records for most appearances, goals and points.

He was awarded an MBE in the 2014 Queens' Birthday Honours and was runner-up to Andy Murray in the BBC Sports Personality Awards last December.