Teams Dean Cosker played for
| Main FC | Glamorgan (1996-2015) |
| Main ListA | Glamorgan (1996-2016) |
| Main Twenty20 | Glamorgan (2003-2016) |
| Other FC | The Rest (1997) |
| England A (1997/98-1998/99) | |
| Marylebone Cricket Club (2010) | |
| Other ListA | England A (1997/98-1998/99) |
| Under-19 Test | England Under-19s (1996-1997) |
| Under-19 ODI | England Under-19s (1996-1997) |
| Second Eleven Championship | Glamorgan Second XI (1994-2016) |
| Second Eleven Trophy | Glamorgan Second XI (1996-2016) |
| Second Eleven Twenty20 | Glamorgan Second XI (2014-2016) |
| South Wales Premier League | St Fagans (2006-2007) |
| South Wales New Premier League | Ammanford (2010-2013) |
| Newport (2016-2018) | |
| Twenty20 Blast | Glamorgan (2003-2016) |
| County Championship | Glamorgan (1996-2015) |
| Miscellaneous | Millfield School (1993-1996) |
| English Schools Cricket Association South (1994) | |
| Marylebone Cricket Club Schools (1994) | |
| English Schools Cricket Association (1994) | |
| Glamorgan Young Cricketers (1994-1995) | |
| Glamorgan Colts (1994-1995) | |
| England Under-17s (1995) | |
| England Under-19s (1996/97) | |
| Glamorgan (1998-2016) | |
| Wales Celebrity XI (2001) | |
| Wales (2003-2005) | |
| Glamorgan Second XI (2004-2016) | |
| MA Wallace's XI (2015) |
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