Kasey Bos

Kasey Bos
Personal information
Date of birth (2004-05-08) 8 May 2004
Place of birth Melbourne, Australia[1]
Height 1.80 m (5 ft 11 in)[2]
Position Left-back
Team information
Current team
 Excelsior Rotterdam
(on loan from Mainz 05)
Youth career
Point Cook[3]
Melbourne City
2021–2023 Melbourne Victory
Senior career*
Years Team Apps (Gls)
2023–2025 Melbourne Victory NPL 27 (3)
2023–2025 Melbourne Victory 30 (4)
2025– Mainz 05 II 14 (0)
2025– Mainz 05 0 (0)
2026– → Excelsior (loan) 0 (0)
* Club domestic league appearances and goals as of 16 May 2026

Kasey Bos (born 8 May 2004) is an Australian professional soccer player who plays as a left-back for Eredivisie club Excelsior Rotterdam, on loan from Bundesliga club Mainz 05.

Club career

After playing a key role in Melbourne Victory Youth's promotion from NPL3 to the second tier of Victorian football, on 8 February 2024, Bos was elevated to Melbourne Victory's senior squad.[4]

Bos made his A-League debut with Melbourne Victory as a substitute against the Central Coast Mariners on 25 February 2024.[5]

In Melbourne Victory's elimination final against Melbourne City on 5 May 2024, with the Victory trailing 1–0 with less than 3 minutes of regulation time remaining, Bos assisted Nishan Velupillay's 88th-minute equalising goal, which sent the match into extra time, with the Victory eventually prevailing 3–2 in a penalty shootout.[6]

Bos scored his debut first-team goal with Melbourne Victory in an Australia Cup match against Moreton City Excelsior on 14 September 2024, with Bos scoring the Victory's third goal in an eventual 4–0 win.[7][8]

Bos scored his debut A-League goal on 1 March 2025, a last-minute 97th-minute equaliser against Brisbane Roar, which helped the Victory secure a 1-1 draw.[9]

In June 2025, Bos signed for Bundesliga club Mainz 05 on a four-year contract.[10] On 3 June 2026, he was loaned to Excelsior in the Netherlands for the 2026–27 season.[11]

International career

In June 2025 Bos was called up by the Australian national team for their June FIFA World Cup qualifiers against Japan and Saudi Arabia.[12]

Personal life

Bos is the younger brother of Jordan Bos of Feyenoord, whom he played alongside at Melbourne City FC Youth.[13][14]

Career statistics

As of 13 June 2025[15]
Appearances and goals by club, season and competition
Club Season League National cup Continental Other Total
Division Apps Goals Apps Goals Apps Goals Apps Goals Apps Goals
Melbourne Victory Youth 2023 NPL Victoria 3 16 3 0 0 0 0 — 16 3
Melbourne Victory 2023–24 A-League Men 2 0 1 0 2 0 — 5 0
2024–25 23 3 4 1 3 1 — 30 5
Total 25 3 5 1 5 1 — 35 5
Career total 41 6 5 1 5 1 — 51 8

References

  1. ↑ Kasey Bos at WorldFootball.net
  2. ↑ "Kasey Bos". Melbourne Victory FC. Retrieved 23 December 2024.
  3. ↑ "Subway Australian U-23 squad named for Doha International Cup | Socceroos". 11 March 2025.
  4. ↑ "Melbourne Victory elevates Kasey Bos". Melbourne Victory FC. 8 February 2024. Retrieved 23 December 2024.
  5. ↑ "Post-Match Reaction | Tony Popovic on Mariners Defeat". Melbourne Victory FC. 25 February 2024. Retrieved 23 December 2024.
  6. ↑ Comito, Matt (25 September 2024). "Wonderkids, Socceroo's bro & a BMX champ: Your Isuzu UTE A-League side's young player to watch". A-Leagues. Retrieved 23 December 2024.
  7. ↑ "Match Report | Victory Into Semi-Finals". Melbourne Victory FC. 14 September 2024. Retrieved 23 December 2024.
  8. ↑ Lynch, Joey (15 September 2024). "Victory move into Australia Cup semi-finals, Oakleigh Cannons succumb to Macarthur". Neos Kosmos. Retrieved 23 December 2024.
  9. ↑ Gould, Joel (March 2025). "Victory secure point with late equaliser against Roar". The Canberra Times. Retrieved 2 March 2025.
  10. ↑ "Mainz 05 verpflichtet Australier Kasey Bos" [Mainz 05 signs Australian Kasey Bos]. Kicker (in German). 13 June 2025. Retrieved 13 June 2025.
  11. ↑ "Kasey Bos joins Excelsior Rotterdam on loan". 1. FSV Mainz 05. 3 June 2026. Retrieved 9 July 2026.
  12. ↑ Brischetto, Pat. "Socceroos World Cup qualifying squad - Two debutants named for Australia's crucial Japan, Saudi Arabia clashes". Optus Sport. Retrieved 8 June 2025.
  13. ↑ Pisani, Sacha (10 May 2024). "My brother is already a Socceroo & I'm ready to follow his footsteps in the A-Leagues". A-Leagues. Retrieved 23 December 2024.
  14. ↑ Lynch, Joseph. "Bos Moves: Kasey Bos looking to seize opportunities at Victory". JDL Media. Retrieved 23 December 2024.
  15. ↑ "Kasey Bos - Player Statistics 2023". GameDay. Retrieved 13 May 2025.
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