Getty Kenny Clark #95 of the Dallas Cowboys In 17 games last year, the Dallas Cowboys committed a total of 133 penalties, the most in the NFL . Not all of those were on the defense, of course, but there was a significant portion of those calls that stemmed from the D–Dallas was whistled for eight defensive offsides, second-most in the NFL, for example. That’s emblematic of a unit was that undisciplined and lacked an attention to detail. The number that showed just how undisciplined was 511.