In 2019, Diouf was signed to Orlando City B ahead of their inaugural USL League One season. On 30March 2019, Diouf made his debut for Orlando City B in a 3–1 loss against FC Tucson. Diouf played the entire match. He scored his first goal for the team on 14 April 2019, in a 1–1 draw against South Georgia Tormenta.
On 21 April 2020, Diouf signed for USL Championship team Austin Bold having spent preseason on trial with the club although USL had already temporarily suspended play due to the COVID-19 pandemic in March. He scored his first goal for the club on 8 August 2020, in the 38' of a 4–1 home victory against RGV Toros.