Amateur and college In 2022, Diene played for FC Motown in USL League Two. He also helped them win the NPSL title. Later that year, he joined the
Rider Broncs. In 2022, he played all 17 of the Broncs's games and started in 16, scoring 3 goals and 2 assists. The following year, he scored 13 goals and 3 assists across 20 games. The following season, he scored 13 goals and 3 assists across 20 games. While with the Broncs, Diene played with Momo Diop, who originated from the same town in Senegal.
Professional Pittsburgh Riverhounds In January 2024, Diene signed with the USL Championship club Pittsburgh Riverhounds. Riverhounds coach
Bob Lilley praised Diene for his speed and finishing ability. He made his debut against
New Mexico United on March 9 in the 1-0 loss. In the third game of the season against
Louisville City FC, Diene got his first goal contribution, assisting
Edward Kizza's goal in the 3-1 loss. A few weeks later, Diene scored his first professional goal, finding the back of the net in the 3-1 win over
Phoenix Rising FC. He became a free agent following Pittsburgh's 2024 season.
One Knoxville On February 3, 2025, Diene was announced as signed by
USL League One club
One Knoxville for their 2025 season. Diene scored a free-kick, as well as assisting Scott McLeod's goal, in a 0–3 win over
Appalachian FC in the
U.S. Open Cup. ==Honours==