2.6 Attestation engagements concern examining, reviewing, or performing agreed upon procedures on a subject matter or an assertion4 about a subject matter and reporting on the results.
Attestation engagements deal with reviewing procedures about one subject.
While the First Amendment limits government action, not that of an employer, doesn't MLB--a group that constantly claims to symbolize America--have sufficient respect for that doctrine not to threaten to fire a guy for expressing his (albeit despicable) views?