After Osef had one successful experience in overcoming his drug cravings, a second and a third soon followed.
A basketball player who could become a famous player in the NBA naturally had strong willpower. Without it, he wouldn't have able to gain a foothold in the NBA. The more he resisted his cravings, the easier it became to do so.
More importantly, Osef could not buy drugs in Los Angeles. The Mexican drug dealers took Dai Li's money and said that they would not sell to Osef. The drug dealers in Los Angeles couldn't risk offending suppliers just so they could sell to one buyer. In addition, Osef was a celebrity. He almost died as a result of an overdose. If Osef really died, the dealer who sold him the drugs would get into trouble.
Osef was forced to detoxify because he couldn't buy drugs. After going through several days of painful withdrawal and all-day training, his physical condition improved.
