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And for a shot putter, his 1.86m and 84kg frame is, well, slight.
But he is awfully strong and uses his explosive speed to launch the shot put, javelin, discus or hammer as far as he can. And that is a long way.
The year 13 Otago Boys' High School pupil smashed the school's senior shot put record recently with an effort of 14.47m, eclipsing Allan Halberg's record of 14.17m set in 1972.
Two other long-standing records tumbled on the day.
Nathan Hill ran a time of 4min 25.56sec for the under-15 1500m to break Robbie Johnston's record of 4min 27sec which had stood since 1982.
And Jackson Toms cleared 10.53m to break David Thompson's 2003 record of 10.30m in the under-14 triple jump.
But McLeod-Jones stole the show with his big throw.
''I'm not really that big but I've done a lot of training,'' the 17-year-old said.
''I've been training with my coach, Howden Finnie, since I was perhaps 12 and have worked on my technique and speed training.
''You want to be as flexible and as dynamic as possible when you are throwing. A lot of people are shaped like bricks and rely on brute strength.''
Breaking the 43-year-old record was a thrill. He had hoped to break a senior record while at school but thought it might come in the discus or javelin, his favoured events.
''It was pretty cool to get a record under my belt. I wanted at least one and it was either that or discus.
''It is funny because shot put is not my best event ... so I was happy and surprised about that, to be honest.''
The discus record came in the weekend at the Caledonian during the Otago secondary school championships.
He broke the senior boys' discus record with a throw of 44.14m.
McLeod-Jones' next meet is at the national track and field championships in Wellington this weekend where the country's best athletes will compete for honours.
''I'm hoping to medal in javelin and discus.''
He will contest the under-20 discus and javelin and the under-18 discus, hammer, javelin and shot put. His older brother, Bryn, will contest the senior discus, hammer, javelin and shot put.
Name: Hugh McLeod-Jones (17).
School: Otago Boys' High School.
Achievements: Broke the Otago Boys' senior shot put record (set in 1972); broke the Otago schools senior discus record.