Thomas James Keinhorst (born 14 July 1990) is a German international rugby league footballer who plays as a centre or second-row forward for Hull Kingston Rovers in the Betfred Super League. He has previously played for the Leeds Rhinos 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. Keinhorst has also spent time on loan from Hull KR at the York City Knights in the Betfred Championship.