Yup, all Dallas has to do is get the NFL to revoke free agency and salary cap rules and get Minnesota to give them 15 draft picks for Tony Pollard and let the titles roll in.
Jokes aside, the playbook was simple on offense but it required a ton of reads. Emmitt had to read holes. Troy and Irvin had to be on the same page. Basically, the players reacted to the defense and adjusted to it accordingly in real time. If Irvin saw zone, he sat down. Inside leverage? Run an out. Etc. A single pass route had a ton of options. There were adjustments made and the required skill and timing was significant.
On defense Wannstedt was one of the first guys to run zone blitzes. He also rotated personnel on the line and did mixed coverages. On defense, the coaching was ahead of its time.
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In an era where everyone plays under the same salary cap, little things give you the edge. Games are a chess match and Jerry doesn't seem to care or realize it.