Peyton Manning had a previously unreported fourth medical procedure on his neck last year, according to a report by Sports Illustrated. The quarterback missed the entire 2011 season after having what was thought to be his third neck surgery in less than two years. According to the report, Manning had a fourth procedure after his May 23 surgery to fix a bulging disk and before his neck fusion surgery Sept. 9. All four of the procedures were to the right side of the quarterback's neck.