1. Jimmy Keinhorst has previously played for the Leeds Rhinos and Hull KR in the Super League, and spent time on loan from Leeds at the Hunslet Hawks in the Championship, as well as the Wakefield Trinity Wildcats and the Widnes Vikings in the Super League.
Jimmy Keinhorst has spent time on loan from Hull KR at the York City Knights in the Championship.
Jimmy Keinhorst has played rugby union for Heidelberger RK in the German Rugby-Bundesliga and in England with Otley in National League 1.
Jimmy Keinhorst began playing rugby league in 2004, while attending St Mary's Catholic High School.
Jimmy Keinhorst primarily played as an inside-centre, but he could play as an outside-centre or in the second row.
Jimmy Keinhorst played eight games and scored four tries in his first season.
Jimmy Keinhorst signed for Leeds in 2011, and made his Super League debut on 30 July 2012, in the defeat by the Wakefield Trinity Wildcats.
Jimmy Keinhorst came on as a substitute in Leeds' losing effort in the 2012 Challenge Cup Final defeat by Warrington at Wembley Stadium.
Jimmy Keinhorst scored a hat-trick of tries for Leeds in round 2 of the 2018 Super League season, against Hull Kingston Rovers at Elland Road.
In October 2018, Jimmy Keinhorst signed a three-year deal with Hull Kingston Rovers.
On 9 January 2019, Jimmy Keinhorst received the number 4 jersey ahead of the start of the Super League season.
On 4 September 2020 it was reported that Jimmy Keinhorst would resume with Hull KR after his loan period at the York City Knights.
On 24 March 2023, Jimmy Keinhorst joined Keighley for one match on loan from Hull Kingston Rovers through dual registration.
Jimmy Keinhorst made his debut for Germany in a match against Poland on 20 November 2010.
Jimmy Keinhorst scored his first try for Germany a week later against the Netherlands in Amsterdam.
Jimmy Keinhorst is the youngest of four rugby-playing brothers and qualifies to play for Germany through his German father Wolfgang, who has lived in the United Kingdom for many years.