The series of ACL (anterior cruciate ligament) injuries to prominent NBA stars has been a major storyline in the league over the past few months.
Stars Al Jefferson (2009), Kendrick Perkins (2010) and David West (2011) injured their knees in the not-too-distant past.
Then the floodgates opened in the spring of 2012, with the likes of Ricky Rubio, Iman Shumpert and Derrick Rose tearing their ACLs. The 2012-13 season hasn't been any kinder, with Brandon Rush, Rajon Rondo and Lou Williams biting the dust.
Is there a logical explanation for this rash of ACL injuries in recent years?
We looked at trends in the sport today and also spoke with licensed family physician Dr. John O'Brien, M.D., who has more than 25 years of experience dealing with sports-related knee injuries.