Wahab's ankle injury had put a stop to the most expensive spell in Champions Trophy cricket on Sunday, and it was confirmed the following day that it would keep him away from cricket for a further two weeks. He is being sent back to Lahore.
The selection committee met in PCB's headquarters on Tuesday to size up two possible replacements in Raees and recent Test debutant Mohammad Abbas. Raees was preferred for his ability to "bowl in the death overs" and for having a relatively "better strike rate" in limited-overs cricket.
Raees, hailing from Karachi, was was the third-leading wicket-taker in the recently-concluded second edition of the Pakistan Super League, where he turned out for Islamabad United. He came into prominence last year after being named in Pakistan's squad for the World T20. However, a Grade-1 hamstring strain delayed his debut by a few months. The debut was one of two T20Is he has played, and came in September 2016 against West Indies in Abu Dhabi.
Umar Farooq is ESPNcricinfo's Pakistan correspondent