Schwaab started at centre–back on 15 April 2018, as PSV Eindhoven beat rivals Ajax 3–0 to clinch the Eredivise title. After the match, his performance was praised by Piet de Visser, Huub Stevens and Jan Peters. His contributions and influence to the team were praised by teammate Steven Bergwijn and manager Cocu.
Schwaab began as a centre-back on April 15, 2018, as PSV Eindhoven defeated rivals Ajax 3–0 to secure the Eredivisie title. After the match, his performance was lauded by Piet de Visser, Huub Stevens, and Jan Peters. His contributions and impact on the team were praised by teammate Steven Bergwijn and manager Cocu.