Dude stop. #23 is right beside Brown when the ball is released and #26 over the top and opened up to Brown's side when the ball was snapped. If Dak looks over at Brown both those guys go to him. They ran to the middle because that's where the ball went, giving the appearance that Noah was "wide open." Which he was.. after the ball was thrown..
Watch the tape at 16:37-17:33 and LISTEN! At 16:37 the safety has his hips turned out toward Noah brown in bracket coverage. He comes off him, turn his hips to the inside and moves inside the numbers 3-4 yards.
At 17:31 on the tape Dak has not delivered the ball yet, safety over Brown is turned in (warner is breaking down the tape). Based on that and the depth of the middle safety the pass should go to the outside per HOF QB Kurt Warner.
Dak missed the play two ways. Based on high 2 coverage, CD is turning up field not crossing the safety's face like its single high and based on the depth of the middle safety, hip position of left safety, the pass should go to the outside or check down.
It's the QB's responsibility to read coverages and have WR's on the same page..Dak has struggled reading disguised zone coverages since mid last season, this is not new.