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Washington University in St. Louis

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2025-26 Men's Swimming and Diving Roster

Jack Sieckhaus

  • Height 5-10
  • Class Sophomore
  • Hometown Mercer Island, Wash.
  • Highschool Mercer Island

Biography



Personal Bests
Event Time Date Meet
50 Freestyle 21.70 12/5/24 Denison Invitational
100 Backstroke 50.63 11/22/25 Phoenix Fall Classic
200 Backstroke 1:51.27 11/23/25 Phoenix Fall Classic
100 Breaststroke 59.48 2/21/26 McKendree Last Chance
100 Butterfly 51.58 11/22/25 Phoenix Fall Classic
200 IM 1:54.83 11/21/25 Phoenix Fall Classic

2025-26: Hit new personal bests in the 100 backstroke, 200 backstroke, 100 breaststroke, 100 butterfly and 200 IM... Academic All-UAA.
  • Season Bests (Individual)
    • 50 Freestyle: 21.87 (Phoenix Fall Classic)
    • 100 Backstroke: 50.62 (Phoenix Fall Classic)
    • 200 Backstroke: 1:51.27 (Phoenix Fall Classic)
    • 100 Breaststroke: 59.48 (McKendree Last Chance)
    • 200 IM: 1:58.23 (Phoenix Fall Classic)
2024-25: Swam freestyle, backstroke, butterfly and IM for the Bears.
  • Season Bests (Individual)
    • 50 Freestyle: 21.70 (Denison Invitational)
    • 100 Backstroke: 51.09 (Midwest Invitational)
    • 200 Backstroke: 1:51.90 (Midwest Invitational)
    • 100 Butterfly: 54.34 (Chicago)
    • 200 IM: 1:58.23 (Denison Invitational)

High School: Earned four varsity letters... Served as team captain... Named first team All-Kingco... Two-time state champions... Named Mercer Island High School Scholar-Athlete of the Year.

Personal: The son of John and Kristy Sieckhaus... Majoring in neuroscience and spanish.

Historical Player Information

  • 2024-25Freshman

  • 2025-26Sophomore

    5'10"