A goal from the Nigerian sealed a comprehensive victory for Die Königsblauen at home in the German Bundesliga on Saturday night
He came on from the bench in the 78th minute to replace Max Meyer and justified his inclusion by grabbing the last goal of the game in the closing seconds of the game.
Joel Matip and Roman Neustadter had given the hosts a first half win before Julian Draxler and Obasi completed the rout in the highly exciting encounter.
Josip Drmic got the visitors’ lone strike in the closing stages of the game.
Schalke 04 are placed third on the Bundesliga table with 64points from 34 matches.