Honestly, at this point, I strongly disagree with this being a Tampa 2 coverage. Tampa 2 is predicated upon the MLB covering anywhere from the vertical seam to the middle third, and that area is occupied by Weddle. Mosley is basically covering what amounts to the deep hook/curl zone just inside of the numbers, mirroring Clark on the other side. My main issue with the possibility of Canady doubling on LaFell is that LaFell didn't have a semblance of clear separation at the time that Canady trailed off in his direction. At this very moment, Canady has already zeroed in on LaFell (
Link), with his eyes squarely inside the numbers. Carr to that point surrendered 16 yards, so he wasn't likely to struggle with LaFell, a WR without a second gear with 35 yards to that point and an ugly drop. I truly have a difficult time seeing the need to overextend in that scenario.
Here's why I personally attribute the results mainly to Canady instead of Mosley. This is the outlook as Dalton is gearing up for the throw (
Link). I've highlighted where the catch was made. Coincidentally, it's almost a mirror reflection of where Tony Jefferson is positioned on the opposite side, whom is also covering the same exact principles. Jefferson, Clark, Weddle and Mosley are all facing the QB. The latter three remain shallow given that they have expected help over the top. We now know that it's a go-route by Boyd. However, at the time, this was obviously not a given. If Mosley carries himself up the field and Boyd sits down at the sticks, it's a possible first down. If he carries himself up the seam and Boyd continues, they could dump it to Bernard and attempt to convert to the now-open side. Both aren't quite likely, but that's why Mosley stays home in his zone, and do Weddle and Clark. It is incredibly difficult to successfully be a hero in zone coverage on the back end. Each level trusts the players behind them to be in position. Not only is Canady not near the zone, he's also facing the complete opposite direction as it's about to be made. Could Mosley have drifted back further? Perhaps so, but the catch is made 7 yards behind him, at the exact spot where the safety was seemingly intended to be, and I don't believe that this was his designation. He would've had to vacate his zone entirely. To me, the play falls apart entirely the moment that Canady makes the decision to commit entirely to LaFell. It was far from a perfect play-call as well, as both you and I have mentioned. But looking at the second image above, it's hard not to wonder what would've happened if Canady was in position. If he's staying home and facing the play, it could very well be dead in the water for Cincinnati baring a miraculous catch and/or YAC. That's just my opinion though. Take it only for what it's worth.