• Catherine A Logan, Colin P Murphy, Anthony Sanchez, Grant J Dornan, James M Whalen, Mark D Price, James P Bradley, Robert F LaPrade, and Matthew T Provencher.
• The Steadman Clinic, Vail, Colorado, USA.
• Orthop J Sports Med. 2018 Jul 1; 6 (7): 2325967118787182.

BackgroundThe medial collateral ligament (MCL) is one of the most commonly injured structures in the knee, especially in young athletes. The impact of MCL injury on National Football League (NFL) performance in elite collegiate athletes has not yet been described in the literature.PurposeWe aim to (1) describe the prevalence and severity of MCL injuries in NFL Combine participants, (2) detail injury management, and (3) analyze the impact of MCL injury on NFL performance in terms of draft position, games played, games started, and snap percentage.Study DesignCohort study; Level of evidence, 3.MethodsA retrospective review of all NFL Combine participants from 2009 to 2015 was performed by reviewing medical records and imaging reports from the combine to identify all players with MCL injuries. A control group was developed from the players evaluated at the combine without MCL injury. For each affected knee, the MCL injury was classified by location and severity based on results of magnetic resonance imaging (MRI). Each player's respective NFL draft position, number of NFL games played, number of NFL games started, and NFL snap percentage for the first 2 seasons in the league were collected through the use of NFL.com and Pro-Football-Focus, which are web-based, publicly accessible, comprehensive sports statistics databases.ResultsA total of 2285 players participated in the NFL Combine between 2009 and 2015. Three hundred one athletes (13.2%) were identified as having MCL injuries; 36 (12%) of the athletes with MCL injury presented with bilateral injuries, for a total of 337 MCL injuries. Additional soft tissue injury was identified on 187 of 337 (55%) MRIs. Players with a history of MCL injury were more likely to play at least 2 years in the NFL compared with those in the control group (P = .003). Players who had isolated MCL injury performed significantly better compared with athletes who had combined injuries with regard to draft position (P = .034), proportion playing at least 2 seasons in the NFL (P = .022), games played (P = .014), and games started (P = .020) in the first 2 years. No significant difference was found between players who underwent operative versus nonoperative management of their MCL injury.ConclusionA relatively high percentage of players at the NFL Combine had evidence of MCL injury (13%). A prior history of MCL tear had no negative impact on an athlete's NFL performance. Players who had isolated MCL injury performed significantly better compared with athletes who had combined injuries with regard to draft position, proportion playing 2 seasons or more in the NFL, and games played and started in the first 2 years.

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