2020: Returned to Pennsylvania and joined the Pittsburgh Riverhounds for the 2020 USL Championship season. Started 14 of 17 appearances in the truncated season due to the COVID-19 pandemic, tallying six goals and two assists. Both of his assists came in the season opener – a 3-1 victory over Louisville City FC (July 12). Tallied the game-winner in the following match, resulting in a 6-0 win over Philadelphia Union II (July 18). Scored a goal and won a penalty for his side in a 4-1 victory against New York Red Bulls II (Aug. 8). Scored his third goal of the season in a 2-2 draw with Saint Louis FC (Aug. 22). Notched the game-winner in a 3-0 win against New York Red Bulls II (Sept. 5) before bagging a brace on the way to a 5-0 victory over Hartford Athletic (Sept. 12).
2019: Nashville SC opted to purchase Mensah outright from Inter Allies after an impressive loan stint in 2018. Played in 33 games, scoring seven goals and adding four assists in all competitions. Produced a game-winning performance with a goal and an assist in the 2-0 victory over Memphis 901 FC (April 13). Put his name in the box score for three consecutive games, scoring a goal in a 4-1 win against Bethlehem Steel FC (June 9), tallying an assist during a 3-2 victory over Hartford Athletic (June 16) before adding another goal in a 3-3 draw with Ottawa Fury (June 22). Found the net again in a 2-1 victory over the Charleston Battery (Aug. 24) before playing a hand in both goals with a goal and an assist in a 2-0 win against Loudoun United (Sept. 28). Rounded out the regular season with the game-winning goal in a 2-0 victory over North Carolina FC (Oct. 12). For the second straight year had an impact in the U.S. Open Cup, scoring in a 3-2 victory against South Georgia Tormenta FC 2 (May 14) in the Second Round before tallying an assist on former Sporting KC striker Kharlton Belmar’s goal in a 1-1 draw with the Charleston Battery as Nashville fell on penalties in the Third Round (May 29).
2018: Sent on another loan from Inter Allies, this time to Nashville SC in the USL Championship. Made 34 appearances in all competitions, recording six goals and six assists. Scored his first goal for the club in a 2-0 win over the Charlotte Independence (April 7) before adding another the following game – a 2-1 loss to Indy Eleven (April 14). Tallied his third goal of the season in a 1-1 draw with New York Red Bulls II (May 6) and added the game-winning assist in the next match against Louisville City FC (May 13). Mensah added another assist in a 1-1 draw with Tampa Bay (June 9) before notching a 94th-minute game-winner in the next game, a 1-0 win over North Carolina FC (June 16). Recorded his third assist of the season in a 3-0 victory against Atlanta United 2 (June 30) and added his fourth in a 1-1 draw with FC Cincinnati (Aug. 4). Scored his fifth goal of the season with another game-winner in a 2-0 win over Atlanta United 2 (Sept. 26) before tallying his fifth assist in the regular-season finale – a 3-3 draw with Cincinnati (Oct. 13). Made four appearances in the U.S. Open Cup, tallying an assist in the 3-1 victory over Mississippi Brilla FC (May 23) before scoring against MLS side the Colorado Rapids in a 2-0 Fourth Round win (June 6).
2017: Joined Penn FC on loan in the USL Championship, scoring seven goals and adding two assists in 19 appearances. His first USL goal came against the Richmond Kickers (July 15), notching the game-winner in a 1-0 victory. He scored again in the following game, a 1-1 draw with the Charlotte Independence (July 18). Mensah tallied again in a 3-2 loss to Tampa Bay (Sept. 6) before bagging both goals in a 2-1 victory over Toronto FC II (Sept. 16). He scored in his next two games, bagging the game-winner in a 1-0 win over Ottawa Fury (Sept. 27) and another in a 2-0 victory over Saint Louis FC (Sept. 30). Mensah’s assists came against New York Red Bulls II (July 12) and FC Cincinnati (Sept. 12).
Before USL: Mensah began his professional career in his home country of Ghana with Inter Allies, scoring three goals in 19 appearances.
International: Mensah was called up to the Ghana Under-23 National Team for the 2019 Africa U-23 Cup of Nations where Ghana finished fourth after falling agonizingly on penalties in both the semifinal to the Ivory Coast and in the third-place match to South Africa.