| Full name: | Ralph Alexander Koster |
| Born: | 21st October 1968, Beaufort West, Cape Province, South Africa |
| Batting: | Right-hand batter |
| Bowling: | Right-arm medium pace |
| Teams: | Western Province (Main ListA: 1992/93-1993/94); Western Province (Main FC: 1992/93-1993/94); Western Province B (Main FC: 1993/94); Griqualand West (Main ListA: 1994/95-1996/97); Griqualand West (Main FC: 1994/95-1996/97); All teams |
| Lists of matches and more detailed statistics | |
| First-Class Career Batting and Fielding (1992/93-1996/97) | ||||||||||
| M | I | NO | Runs | HS | Ave | 100 | 50 | Ct | ||
| Overall | 18 | 31 | 3 | 1010 | 95 | 36.07 | 0 | 6 | 5 | |
| First-Class Career Bowling (1992/93-1996/97) | ||||||||||
| Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM | SRate | Econ | |
| Overall | 133 | 2 | 74 | 3 | 1-8 | 24.66 | 0 | 0 | 44.33 | 3.33 |
| List A Career Batting and Fielding (1992/93-1996/97) | ||||||||||
| M | I | NO | Runs | HS | Ave | 100 | 50 | Ct | ||
| Overall | 29 | 26 | 4 | 600 | 77* | 27.27 | 0 | 6 | 3 | |