The Singapore international had a two-year stint with Thai side Army United.
The Protectors announced the signing of Hassan in their Facebook page on Friday.
Warriors are playing the last match of their home leg this season on Friday.
Strikers need a win on Friday to stay alive in the competition.
Yang represented Singapore's table tennis team at 2008 and 2010 Olympic Games.
The Lions midfielder still has a year left in his contract with Tampines Rovers.
Delhi became the first PBL team to lose with a negative point on Tuesday.
Bangladesh face must-win situation in Mount Maunganui.
Scorchers host Heat in the 17th match of the ongoing season.
The former UFC heavyweight champion can return to the octagon in July 2017.
Tottenham Hotspur face Chelsea in the Premier League clash on Wednesday.
One Championship CEO Victor Cui admitted he cannot wait for the fight between the Lee and Huang.
Son Wan Ho and Jan O Jorgensen are leading the campaign for the Acers.
AFC Bournemouth face Arsenal in the Premier League clash on Tuesday.
While Bengaluru won their opening tie, Chennai were outclassed by Hyderabad.