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Plays that get wrs open? Watch any good offense and they design their players to get open. Dallas constantly designs throws into contested plays.
The problem is you can't just scheme players open like its magic. You have to do it one of two ways...
One is you have the playmakers on the team to dictate what the defense can call. The Cowboys have a pretty average at best #2 receiver so it's only Lamb who is dictating any sort of coverage. Other teams with a legitimate number 1 are still throwing high picks at the WR position for a reason. The Cowboys also went cheap at RB. Teams can pretty much bracket Lamb and play everything else pretty straight up without a huge fear of either giving up a big play to a WR or getting gashed in the run game. The one area the Cowboys have had some success scheming open is the TE, but those are typically smaller gains. You can see where they tried to get Turpin open in space today, but its really hard to do because hes simply not much of a threat as a receiver despite his speed.
The other way to do it is to stay ahead of the chains. If you can get some 6-9 yard gains on 1st down you're likely to get some favorable 2nd down coverages that can be exploited. When you take both 1st and 2nd down to get that yardage you're likely to see tight man coverage on 3rd down, or if you do get a zone look you better believe extra pressure is coming so you dont have to for those plays to develop to scheme a player open. In my eyes this is why it was so disheartening to see the Cowboys not go for a better player at RB this offseason. They have some decent role player RBs but they certainly dont have a well rounded back like Kamara we saw today that can keep a defense honest. I think the Cowboys are plenty talented enough on offense to have success in this area against lesser defenses, but against more talented defenses they are really dependent upon Dak/Lamb creating magic.