| Brian Muller | |
| Birth Name: | Brian Leo Muller |
| Birth Date: | 11 June 1942 |
| Birth Place: | Eltham, New Zealand |
| Death Place: | Eltham, New Zealand |
| Ru Position: | Prop |
| Height: | 1.850NaN0 |
| Weight: | 114kg (251lb) |
| Repyears1: | 1967–71 |
| Repcaps1: | 14 |
| Reppoints1: | 0 |
| Ru Province1: | Taranaki |
| Ru Provinceyears1: | 1963–72 |
| Ru Provinceapps1: | 65 |
| Occupation: | Freezing worker |
| School: | St. Joseph's Convent School |
Brian Leo Muller (11 June 1942 – 12 December 2019) was a New Zealand rugby union player. A prop, Muller represented Taranaki at a provincial level, and was a member of the New Zealand national side, the All Blacks, from 1967 to 1971. He played 35 matches for the All Blacks including 14 internationals.[1] He died on 12 December 2019 at the age of 77.[2]