Beware training camp reports.
Unless it is injury-related, suspension-related or playing time-related, NFL intel during the summer is often worthless. There are two main reasons. First, all of the information is coming to you secondhand from beat reporters, while camp can be set up in such a way that each individual doesn't get the best view of each player on each repetition. Second, and much more importantly, training camp practices are too far removed from the reality of regular season games. This is especially true for quarterbacks because they don't need to fear being hit and often work against simpler coverages.
Ryan Tannehill has been earning rave reviews for his play early on during camp. The positivity has primarily centered around his ability to push the ball down the field, something that has been a point of contention throughout his career. Tannehill and Mike Wallace infamously failed to create a consistent connection after the receiver signed a $60 million deal to become the Miami Dolphins' number one receiver. Wallace, along with Brian Hartline and Charles Clay, departed this offseason while Tannehill was given a huge contract extension. The Dolphins clearly felt that their offense needed to be restocked with new talent.
Much of that new talent is expected to help push Tannehill's career 6.77 yards per attempt away from the bottom of the league. His YPA and failure to connect with Wallace combined to create a perception that the QB is incapable of throwing the ball deep. While it's true that he's not a great deep passer, it's unfair to label Tannehill incapable in this area. His statistical output has been suffocated by a subpar supporting cast over the years, as long passes failed to connect due to problems on the receiving end.
[h=3]How Wallace became a problem[/h]Throughout his career, Wallace's value on offense has been primarily based on his incredible straight-line speed. He has never boasted above-average ball skills or precise route running. His speed has allowed him to create separation because defensive backs can't cover him even when overplaying deep routes. With the Steelers, Wallace was competent and consistent catching the ball when open. His consistency began to wane even before he signed with the Dolphins in free agency. Once in Miami, Wallace's skills -- and often his effort -- became a major problem.
http://www.sportsonearth.com/article/142017354/ryan-tannehill-training-camp-reviews-true
Nice work by Fahey here, who has written positively about Tannehill in the past and continues to. Some illustrative gifs in here as well showing drops and other bad work by pass catchers last year.