Manning is required to undergo an exam of his neck every spring under the 2012 contract he signed with the Broncos after missing all of the previous season following neck surgeries.
But this year's test was considered a formality. After all, there was nothing about Manning's record-setting season in 2013 that indicated his neck was still an issue.
Manning spent the first 14 years of his career with the Indianapolis Colts, leading the team to two Super Bowl appearances and one championship. When the Colts opted to release Manning in favor of drafting Andrew Luck in 2011, Manning signed a five-year, $96 million deal with the Broncos in March of 2012.