Melissa Jefferson‑Wooden has had a breakthrough 2025 season in the women’s 100 metres  undefeated, dominant, and now the world champion.

Here’s a detailed look at how she went through the year, what marked her rise, and what it all might mean going forward.

A Year of Unbeaten Speed

From early in the outdoor season, Melissa Jefferson‑Wooden made clear that she was not just a contender, but the woman to beat over 100m.

She ran no fewer than 12 races in the event this year and won every one. (Athletics Weekly)

She lowered her own times multiple times, pushed past other big names, and entered major championships with all the momentum.

Her season began with strong performances in Grand Slam Track meets, moved through Prefontaine, and peaked at the USA Outdoor Championships where she ran 10.65 seconds — a personal best, a joint‑fifth fastest ever by an American, and one of the fastest in the world in 2025. (FloTrack)

Crucially, she delivered when it mattered most — the World Athletics Championships in Tokyo.

In the 100m final she ran 10.61 seconds, setting a new championships record and becoming the fourth fastest woman ever over 100m. (SuperSport)

Key Milestones

• USA Outdoor Championships: At Hayward Field, she put in one of her most emphatic performances.

• She ran 10.65 (+0.4 wind), beating a deep field to win the national title.

• This win both reinforced her unbeaten streak and established her firmly as the frontrunner going into Worlds. (FloTrack)

• Prefontaine Classic / Grand Slam Track Meets: Earlier in the season, she already had strong performances, with times that showed she was capable of sub‑10.80 occasionally.

• These built up her ranking, her confidence, and her form. (Wikipedia)

• World Championships, Tokyo: This was the culminating moment. Jefferson‑Wooden not only defended her perfect record but did so in style — blazing from the blocks, widening the gap, and finishing in 10.61 seconds to set a Championship Record.

• In doing so she outpaced Tina Clayton (silver, 10.76) and Julien Alfred (bronze, 10.84). (SuperSport)

What Makes Her 2025 So Special

1. Consistency at High Level: It’s one thing to win smaller meets; it’s another to keep raising the bar, posting personal bests, and doing so across rounds in a major championship. Jefferson‑Wooden didn’t just win — she was lowering her times and doing it against the best.

2. Mental and Physical Growth: After winning Olympic bronze in 2024, she came back in 2025 with more maturity, better discipline, and apparently tougher training and preparation. She’s talked about refining things — diet, recovery, race strategy — so that they all align. (SuperSport)

3. Performance Under Pressure: Delivering a world title, setting a championship record, going fastest in the world — those are achievements that separate champions from just fast runners.

Breaking Into History: Her 10.61 not only gave her the title but placed her among the fastest women ever in the 100m. It wasn’t just a win — it was a statement. (NBC Sports)

Significance & What’s Next

Jefferson‑Wooden’s perfect 2025 in the 100m does more than add a trophy.

It signals a changing of the guard in women’s sprinting. She has now completed the rare sprint double (100m & 200m) at a World Championships, the first American woman ever to do so. (Reuters)

Her performance puts her in position to chase more: perhaps faster times, perhaps championship records or even the elusive world record if all continues to go right. But maintaining form, staying injury‑free, refining starts & phases, managing expectations — those will be the challenges.

Summary

Melissa Jefferson‑Wooden’s 2025 women’s 100m campaign has been exceptional:

• Undefeated all season in 100m races (~12 wins). (Athletics Weekly)

• Personal bests along the way, culminating in huge performances when it counted.

• National title with 10.65s, then World title with 10.61s and a championship record.

She has not merely won  she has dominated and rewritten perceptions of who leads women’s sprinting in this era.