New Delhi, Nov. 16 -- League's widening investigation demands evidence from multiple teams following mafia-linked scheme that allegedly exploited LeBron James and Anthony Davis injury data for illegal wagers

The National Basketball Association has dramatically escalated its investigation into illegal sports betting, demanding cell phones and confidential documents from multiple teams including the Los Angeles Lakers, marking an unprecedented expansion of the probe that has already ensnared a head coach, an active player, and exposed alleged organized crime connections within professional basketball.

The league's aggressive move comes less than three weeks after the FBI arrested Portland Trail Blazers coach Chauncey Billups, Miami Heat g...