Originally written on NFL Injury Report  |  Last updated 11/18/14

ST. LOUIS - OCTOBER 11: Adrian Peterson #28 of the Minnesota Vikings runs to his left toward the end zone in front of teammates Steve Hutchinson #76 and John Sullivan #65 during their NFL game against the St. Louis Rams at the Edward Jones Dome on October 11, 2009 in St. Louis, Missouri. The Vikings defeated the Rams 38-10. (Photo by Dilip Vishwanat/Getty Images)
John Sullivan of the Minnesota Vikings was ranked as the No. 1 center in the NFL by Pro Football Focus in 2012. Whilst offensive tackles Matt Kalil and Phil Loadholt garnered plenty of attention, Sullivan flew under the national radar while paving the way for Adrian Peterson's MVP campaign The Vikes are now expected be without Sullivan for the majority of their offseason program. ESPN Twin Cities reported the 27-year-old underwent "relatively minor" microfracture surgery to repair a small lesion in his left knee last week; "Sullivan, 27, had the surgery on Thursday at Dr. James Andrews' office in Pensacola, Fla. He is facing a three- to four-month rehabilitation -- likely sidelining him for a good chunk of the Vikings' offseason program, which culminates with the mandatory minicamp in mid-June." While microfracture surgeries have been known to derail players' careers and are frequently accompanied by setbacks, the Vikings are reportedly confident that Sullivan will be ready for the start of the 2013 season. Sullivan played every snap of the regular season, and should have gone to the Pro Bowl for the first time in his 5th season, however, the requirement for surgery following the wildcard defeat at Green Bay was of paramount importance for a man who helped Peterson get just 8 yards shy of Ernie Dickerson's all-time regular season rushing record. Sullivan missed out on a $500,000 escalator because of the Pro Bowl snub. He has four years remaining on the five-year, $25.1 million contract extension he signed in December 2011, with a scheduled base salary of $3.15 million in 2013. Follow @TheNFLInjuryRpt !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="http://www.thenflinjuryreport.com//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); var _gaq = _gaq || []; _gaq.push(['_setAccount', 'UA-34100676-1']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })();
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