The rules for abbreviations and acronyms may often seem contradictory, but they generally depend upon how common their usage is and how likely they are to cause confusion for a reader.

All leagues and conferences may be referred to by their acronym on first reference, if its acronym is commonly used: NFL, MLB, NASCAR, ACC, PGA, AL East, NFC West

See: American League, National League

Certain college teams may be referred to by special acronyms or abbreviations. See: college teams

The following titles are acceptable in all headlines, and upon second reference in copy: QB,
DH, GM, CEO, VP. All other positional titles should be avoided, particularly those drawn from fantasy sports such as “WR1,” “RB2,” etc.