The teenage sharp shooter was signed earlier in the year but was loaned back to Division One League outfit Nkoranza Warriors until the end of the season but following the cancellation of the 2019-2020 football calendar, Mensah has been announced as a bona fide member of the Phobian fraternity.
Nkoranza Warriors have turned into a one-stop shop for some of the top-flights big guns with Hearts of Oak nemesis Asante Kotoko already swooping Emmanuel Sarkodie.
The Phobians have taken a leaf from the booklet of their foes with the acquisition of Mensah, who banged in seven goals in ten games in the 2019-2020 Division One League, averaging 0.7 goals per game.
The Rainbow Club were largely blunt up front with burly striker Kofi Kordzi, shouldering much of the goalscoring burden with the former African champions netting 15 goals in fourteen games in the cancelled 2019-2020 Ghana Premier League.
Isaac, 18, is expected to inject more firepower up front as Continental Club Masters seek to restore their glory days. Mensah holds the record of being the only player (in the Premier league and Division One) to score 4 goals in a game.
He achieved this enviable feat on match day eleven when his side faced Gbewaa FC at the Aliu Mahama sports stadium in Tamale.