Lathouwers started playing football in the youth ranks of SV Rap and later AZ, where he in 2017 secured a contract until 2020.[1] He made professional debut on 22 December 2019 for the reserve team, Jong AZ, in a 3–1 away loss against Telstar in the Eerste Divisie. He replaced Anton Fase in the 70th minute.[2] However, due to a long-term injury, this remained his sole appearance that season.[3] Despite his contract expiring in 2020, Lathouwers opted to stay with AZ on amateur terms.[3] During the 2020–21 season, he featured in 13 league matches, impressing the club management to earn a new contract until 2022 with an option for an additional year.[4]
On 18 March 2022, Lathouwers scored his first professional goal, securing a crucial 1–0 away win against Jong Utrecht.[5] His consistent performances made him a key player for Jong AZ, and he even made his unofficial debut for AZ's first team during the 2022–23 preseason, competing with Yukinari Sugawara and Pantelis Chatzidiakos for a spot.[6]
VVV-Venlo
In January 2023, Lathouwers joined VVV-Venlo, reuniting with former teammates Sem Dirks and Richard Sedláček. Signing a contract until 2025 with an option for an additional year,[7] he made his debut for VVV-Venlo on 11 January 2023, coming on as a substitute for Simon Janssen in the 76th minute during a 3–2 loss to Emmen in the KNVB Cup.[8]