Mainz 05 has loaned Kasey Bos for a season. The Australian will play for Excelsior Rotterdam in the Dutch Eredivisie, as the Mainzers announced. The 22-year-old will gain experience in the 13th-placed team of the previous season. In the previous season, the left-back played only 14 games in the Regionalliga team of the Mainzers. For Kasey, it is important to get playing time at the highest level – at Excelsior Rotterdam, he has the opportunity to develop in a top league. Excelsior Rotterdam is the ideal club for this. Additionally, the proximity to his brother Jordan, who already plays a prominent role at Feyenoord Rotterdam, will certainly help with the adaptation to a new city.