Stijn van Gassel

Helmond Sport

Van Gassel made his professional debut in the Eerste Divisie for Helmond Sport on 22 April 2016 in a game against FC Oss. In the 2016–17 season, he played the final games due to an injury to starting goalkeeper Ferhat Kaya. In the same season, he signed a contract extension with Helmond Sport until 2019. Due to Kaya's departure, Van Gassel became the starting goalkeeper of Helmond Sport ahead of the 2017–18 season.

Excelsior

On 12 March 2021, Van Gassel rejected an offer by Helmond Sport to extend his contract, in order to pursue an opportunity to play at a higher level. On 31 May 2021, he agreed to sign for fellow Eerste Divisie club Excelsior on a two-year contract starting 1 July. He made his debut for the club on the opening day of the 2021–22 season in a 1–0 home loss to TOP Oss. This match also marked his 150th professional appearance.

NEC

On 19 June 2024, Eredivisie club NEC announced that Van Gassel had signed a two-year contract with the club, with an option for an additional season.

Return to Excelsior

On 30 June 2025, Van Gassel returned to Excelsior with a two-season contract.

Club

As of match played 17 May 2026

Van Gassel came in the news in June 2026, when his Rotterdam house appeared not be as renovated as the former owners had stated and he went to court.

Individual

Eredivisie Team of the Month: April 2023