Chris Guiliano Blasts 47.38 100 Free Pro Series Record in Prelims, Becomes World #1 this Season

2026 Pro Swim Series – Westmont

• Wednesday, March 4 – Saturday, March 7, 2026
• FMC Aquatic Center, Westmont, Illinois
• Long Course Meters (50 meters)
• Meet Central
• Psych Sheet
• Results on Meet Mobile: “2026 TYR Pro Swim Series – Westmont”
• Live Stream
• Day 1 Prelims Heat Sheet
• Live Recaps
  • Prelims: Day 1

MEN’S 100 FREE – PRELIMS

• World Record: 46.40, Pan Zhanle (CHN) – 2024
• American Record: 46.81, Jack Alexy – 2025
• U.S. Open Record: 46.99, Jack Alexy (USA) – 2025
• Pro Swim Record: 48.00, Nathan Adrian (USA) – 2016

Semi-Final Qualifiers: 

1. Chris Guiliano (TXLA), 47.38 *PSS Record*
2. Matt King (ISC), 48.61
3. Brooks Curry (CAL) / Sean Niewold (BAMA), 48.81
4. –
5. Luke Hobson (NYAC), 49.06
6. Ruslan Gaziev (CAN), 49.20
7. Lamar Taylor (UN), 49.50
8. Matt Temple (AUS), 49.62
9. Finlay Knox (CAN), 49.92
10. Charlie Hawke (AUS), 49.93
11. Tommy Neill (AUS), 50.13
12. Caeleb Dressel (SJAC), 50.22
13. Robin Yeboah (MAAC), 50.30
14. Destin Lasco (PDR), 50.31
15. Kieran Smith (RAC), 50.33
16. Jack Dahlgren (AQJT), 50.35

In the final race of the opening session of the Pro Swim Series in Westmont, Chris Guiliano brought the energy with the fastest 100 free ever at the Pro Series, surging to the final touch in 47.38, matching his winning time from the 2024 Olympic Team trials in Indianapolis, and tying that swim as the 2nd fastest time of his career, only trailing his 47.25 from the semifinals of those Olympic Trials. This swim also makes Guiliano the fastest performer in the world this season.

The previous Pro Series record, previously held by longtime Team USA sprint free ace Nathan Adrian of 48.00, falls after nearly a decade and makes Guiliano the first ever sub-48 time in Pro Swim Series history.

Giuliano was hardly contested in prelims here, getting out to a more than half-second lead over the next fastest finisher, Matt King, at the first turn in 22.42, before extending that lead and putting the event field well behind him with his 24.96 2nd 50.

This swim sets him up to defend his first Pro Series win of the year from Austin, where he won the 100 free in 48.14 in January. This is a promising start ot he calendar year for Guiliano, as he had his share of ups and downs in 2025. Notably finishing 3rd in the 100 free at the US National championships in June, swimming 47.49, not qualifying to swim individually, but still earning a spot on the US World Championship team as a relay swimmer.

At those World Championships, Guiliano led of the prelims 400 free relay in 47.66, and would later split 47.43 in a bronze medal effort as the 3rd leg of that relay.

He bounced back at the US Open in December, taking 2nd in the 100 free in 47.63, a time that betters any of his individual swims from the Olympic Games a year and a half earlier.

Guiliano quickly rose to one of the top sprinters in the world at the US Olympic Trials, winning the 100 free (47.38) and qualifying for his first Olympic Games in both the 50 free and 200 free by finishing 2nd in each. He would finish 8th in the 100 free in Paris that summer in 47.98.

Guiliano, who is training at Texas, after making the move to Austin following the suspension of the Notre Dame Men’s team in 2024, surpasses Youngbeom Kim‘s 47.39 from October’s Korean Sports Festival as the fastest performer in the world this season.

He will be the top seed for this evening’s semifinal, as the session will begin at 7 p.m ET.