| Cai Griffiths | |
| Birth Name: | Cai Llewellyn Griffiths |
| Birth Date: | 5 January 1984 |
| Birth Place: | Bangor, Gwynedd, Wales |
| Height: | 191cm (75inches) |
| Weight: | 123kg (271lb) |
| School: | Ysgol Syr Hugh Owen |
| Ru Position: | Prop |
| Ru Clubyears: | 2002–2003 2003–2012 2012–2013 2012–2013 2013–2014 2014– |
| Ru Proclubs: | Neath Ospreys London Irish → Ospreys (loan) London Welsh Ospreys |
| Ru Clubcaps: | 2 115 6 8 13 |
| Ru Clubpoints: | (0) (0) (0) (5) (0) |
Cai Griffiths (born 5 January 1984) is a Welsh rugby union player who plays for London Welsh. Griffiths' position of choice is as a Tighthead prop. In December 2012 he rejoined former club Ospreys on loan. On 4 July 2013, it was announced Griffiths to leave Ospreys following loan deal to join London Welsh for the 2013/14 season.[1]