Radamel Falcao made his Manchester United debut a week ago in the game against QPR. This is an amazing recovery for someone who underwent anterior cruciate ligament (ACL) reconstruction in January 2014. This kind of accelerated recovery is
only possible in highly conditioned athletes who are motivated and work intensively with their physiotherapist post surgery. Most other patients, do not return to such high-level sports until 10-12 months post surgery. Tiger Woods took 1 year before he returned to competitive action after such a surgery.
http://www.straitstimes.com/news/sport/football/story/football-radamel-falcao-debuts-man-united-crush-qpr-20140915
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ACL injury.