Macky Frank Bagnack Mouegni (born 7 June 1995) is a Cameroonian footballer who plays for Spanish club FC Barcelona B as a central defender.

Born in Yaoundé, Bagnack came to FC Barcelona in 2008, through the Samuel Eto'o Foundation at the age of 13. He was promoted to the reserves on 3 August 2012.

Bagnack made his professional debut on 8 September 2012, replacing Kiko Femenía in the 75th minute of a 1–0 away win against CD Guadalajara for the Segunda División championship. However, it was his maiden appearance of the campaign.

Bagnack profitted from David Lombán and Marc Muniesa's departures in 2013–14, appearing in 24 matches. He renewed his link with the Catalans on 28 January 2014, running until 2017, and scored his first goal on 7 June, netting the second of a 2–1 away win against Hércules CF.

After appearing with Cameroon under-20's, Bagnack was named in the full squad's 24-man list for the 2015 Africa Cup of Nations. On January 7, 2015, he made his professional debut for Cameroon in a Nations Cup friendly against DR Congo.

He came in at the 46th minute, replacing Raoul Loé and playing the entire second half. He made the final cut of the 23 players selected to participate in the 2015 Africa Cup of Nations.