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Theo Klaassen is a Men's Open Bodybuilding competitor from the Netherlands.

2 career wins

Theo Klaassen

GenderMale
StatusRetired
Medium confidence 5 recorded results, Historical/community source Updated July 10, 2026 Accurate?

Theo Klaassen is a Men's Open Bodybuilding competitor from the Netherlands with a competitive record spanning 1980–1985.

Across 5 recorded contest results, Theo Klaassen has 2 first-place finishes (a 40% win rate).

Win rate here is first-place finishes as a share of all 5 recorded contest results. It is published only where a career holds at least five, because below that a single placing moves the figure by twenty points or more.

Missing from this profile

No height, weight or birthdate on record.

Career Record

Total Results
5
Wins
2
Win Rate
40%
Career
1980–1985
Country
Netherlands
Verified
Sources
1

Every season on record

1980 to 1985 shown · 5 results on record
1980
1983
1984
1985
Olympia 1st place 2nd place 3rd place Other
Pro Debut
1980
Last Contest
1985

All results

Every contest result on record for Theo Klaassen, 5 in all. Won by names the winner of the division Theo Klaassen competed in, and shows a dash where that winner cannot be pinned to one person in the database.

YearContestDivisionPlaceWon by
1985 Holland Grand Prix Men's Open Bodybuilding #5 Willem Jonkman
1985 Holland Nationals Men's Open Bodybuilding #5 Koos Hemminga
1984 Holland Nationals Men's Open Bodybuilding #3 Willem Jonkman
1983 Holland Grand Prix Men's Open Bodybuilding #1 Winner
1980 Holland Nationals Men's Open Bodybuilding #1 Winner

Where these results come from. Each contest in the table was recorded from a named source, and for Theo Klaassen that source is MuscleMemory. Open any contest above and that page names its own source and links to it where the source is still reachable. That archive no longer answers at the addresses we hold, so it is credited by name here and not offered as a link.

Only 2 head-to-head meetings on record so far, with Koos Hemminga ahead 2 to 0 - too thin to call a rivalry yet.

Opponents are ranked by how often they shared a stage and how big the stage was, not by reputation. A meeting is one contest where both competed in the same division and both were placed.