| Grant Muller | |
| Birth Date: | 16 July 1970 |
| Birth Place: | Johannesburg, South Africa |
| Weight: | 65.77kg (145lb) |
| Residence: | Johannesburg, South Africa |
| Yearpro: | 1992 |
| Tour: | Sunshine Tour |
| Prowins: | 5 |
| Sunwins: | 2 |
| Otherwins: | 3 |
| Masters: | DNP |
| Usopen: | DNP |
| Open: | CUT: 2004 |
| Pga: | DNP |
Grant Muller (born 16 July 1970) is a South African professional golfer who plays on the Sunshine Tour.
Muller was born in Johannesburg. He turned professional in 1991 and joined the Sunshine Tour the same year. He has won twice on the Sunshine Tour, with the first win coming in 1997 at the Vodacom Series: Kwazulu-Natal and the second in 2010 at the Lombard Insurance Classic. He has finished in the top-25 of the Sunshine Tour's Order of Merit four times (2000/01, 2001/02, 2004/05, 2010), with his best finish coming in 2001/02 when he finished in tenth.
| No. | Date | Tournament | Winning score | Margin of victory | Runner-up | |
|---|---|---|---|---|---|---|
| 1 | 25 Oct 1997 | Vodacom Series (Kwazulu-Natal) | −5 (71-70-70=211) | 5 strokes |  Hennie Otto | |
| 2 | 6 Jun 2010 | Lombard Insurance Classic | −15 (71-63-67=201) | Playoff | Tongoona Charamba |
Sunshine Tour playoff record (1–1)
| No. | Year | Tournament | Opponent | Result | |
|---|---|---|---|---|---|
| 1 | 2005 | Platinum Classic | Jaco van Zyl | Lost to birdie on first extra hole | |
| 2 | 2010 | Lombard Insurance Classic | Tongoona Charamba | Won on third extra hole |