Brazilian swimmer Cesar Cielo set the 100-metre freestyle world record of 46.91 seconds in 2009.
Notes on verification
Confirmed by multiple independent high-quality sources including sports journalism outlets (CNN, ESPN, SwimSwam) and reference databases (Olympedia, Olympics.com), with consistent details on name, time, event, and date. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.875 clusters=6 claim_tier=notable | kind=empirical eligibility=high]
Sources
- The science games — ABC Science Archive (seed:sports_and_combat)
- https://www.olympedia.org/athletes/115648 (corroboration)
- https://www.olympics.com/en/athletes/cesar-cielo-filho (corroboration)
- https://swimswam.com/david-popovici-goes-46-86-breaks-cielos-13-year-old-100-free-world-record/ (corroboration)
- https://www.cnn.com/2022/08/14/sport/david-popovici-100m-freestyle-record-swimming-spt-intl/index.html (corroboration)
- https://www.espn.com/olympics/swimming/story/_/id/34394687/romanian-swimmer-david-popovici-17-breaks-world-record-100-freestyle (corroboration)
- http://english.cctv.com/20091220/101965.shtml (corroboration)