Calum Daniel Green (born 15 July 1990) is an English rugby union player. He plays lock for Leicester Tigers in Premiership Rugby. He has previously played for Leicester Tigers between 2007 and 2012, as well as for Nottingham and Yorkshire Carnegie in the RFU Championship and featured in over 100 games for Newcastle Falcons between 2014 and 2019. Green was a Premiership Rugby champion in 2022.