Clearly Vincent doesn't know the CBA because the statements regarding "a clear preponderance of the evidence" can only be found in Articles 12 (Revenue Accounting and Calculation of the Salary Cap), 14 (Enforcement of the Salary Cap and Rookie Compensation Pool) and 17 (Anti-Collusion). That's it. Neither of those things apply to this situation. Furthermore, it is up to the complaining party to provide that clear preponderance of evidence, which the NFL, most certainly, did not do.
As for the Paragraph 15 of Appendix A citation, they league violated that because they clearly didn't give Brady a hearing before administering punishment, which that paragraph specifically says..
"... the Commissioner will have the right, but only after giving Player the opportunity for a hearing at which he may be represented by counsel of his choice, to fine Player in a reasonable amount; to suspend Player for a period certain or indefinitely; and/or to terminate this contract."
I'm no lawyer, but giving what amounts to a deposition is significantly different than a hearing, which is what happened yesterday.
Seems clear to me that the league violated it's own due process..