Guiliano Eyeing 400 Free Relay World Record

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Chris Guiliano, a standout swimmer for Team USA, turned heads with a blistering 47.3 in the 100m freestyle prelims at the Westmont Pro Swim. This performance has fueled speculation that the American 400m free relay squad could be poised to take down the longstanding world record, a goal they've been working towards for the past 3 years.

Why it matters

The 400m free relay world record has stood since 2008, and breaking it would be a major accomplishment for the American swim team. Guiliano's impressive showing suggests the US has the talent to achieve this feat, which would be a significant milestone in the sport of swimming.

The details

Guiliano's 47.3 in the 100m free prelims at the Westmont Pro Swim has fueled speculation that the American 400m free relay team is primed to challenge the world record. The US squad has been targeting this goal for the past 3 years, hoping to finally put all the pieces together and take down the legendary mark set in 2008.

• The Westmont Pro Swim took place from March 4-7, 2026.
• Guiliano posted his 47.3 in the 100m free prelims during the first session of the meet.

What they’re saying

What’s next

The US swim team will look to put together their strongest 400m free relay lineup this summer at the Pan Pacific Championships, where they will aim to finally break the longstanding world record.