PLAYER PROFILE / Left-Back
Kasey Bos.
Excelsior Rotterdam · Australia
TM 1154876 · Current player profileAge today22
Recorded moves4
Peak recorded value€450k
Current market value€400k
01 / PLAYER DETAILS
At a glance
- Full name
- Kasey Bos
- Born
- 08 May 2004
- Nationality
- Australia
- Position
- Left-Back
- Preferred foot
- left
- Height
- 186
- Joined current club
- —
- Contract expires
- 30 Jun 2029
02 / THE JOURNEY
Previous clubs
- 1.FSV Mainz 05Last recorded move · 01 Jul 2026
- Melbourne VictoryLast recorded move · 01 Jul 2025
- Melbourne Victory U21Last recorded move · 08 Feb 2024
Clubs from completed, dated transfers, most recent first. Repeat spells are listed in the full transfer history.
03 / VALUE OVER TIME
Market value history
| Valuation date | Age then | Club at the time | Market value |
|---|---|---|---|
| 17 Jun 2026 | 22 | 1.FSV Mainz 05 | €400k |
| 19 Dec 2025 | 21 | 1.FSV Mainz 05 | €450k |
| 03 Jun 2025 | 21 | Melbourne Victory | €450k |
| 09 Jan 2025 | 20 | Melbourne Victory | €400k |
| 08 Oct 2024 | 20 | Melbourne Victory | €150k |
| 28 May 2024 | 20 | Melbourne Victory | €50k |
| 23 Feb 2024 | 19 | Melbourne Victory | €25k |
Each row is a dated valuation. The bar shows its share of the player’s peak recorded value. — means not recorded.
04 / EVERY MOVE
Full transfer history
| Date | From | To | Move | Fee |
|---|---|---|---|---|
| 30 Jun 2027Scheduled | Excelsior Rotterdam | 1.FSV Mainz 05 | Loan return | — End of loan |
| 01 Jul 2026 | 1.FSV Mainz 05 | Excelsior Rotterdam | Loan | — loan transfer |
| 01 Jul 2025 | Melbourne Victory | 1.FSV Mainz 05 | Transfer | €500k |
| 08 Feb 2024 | Melbourne Victory U21 | Melbourne Victory | Internal move | — |
Includes loans, loan returns, internal moves and scheduled transfers. Free means a recorded €0 fee; — means no figure was recorded.