Please cite any evidence you have to support this.
The anti-trust exemptions extended to sports leagues are based on a fundamental understanding of the unique business environment in which these leagues operate -- where the teams are supposed to compete on the field but cannot be expected to engage in competitive business practices with each other like any other industry. It defeats the whole purpose of having a sports league if all of the teams except three or four of them end up going out of business.
This is why U.S. law allows these sports leagues to engage in practices that would be outlawed in any other industry -- like player drafts and salary caps.
Even the thought of a draft would be absurd in any other industry. Can you imagine a top lawyer graduating from Harvard law school and being told: "Sorry, dude. I know you wanted to join that top law firm in New York City, but the Los Angeles prosecutor's office had the first pick in the draft so you have to go work for them." LOL.
Can you name any industry that hasn't been given an exemption that hasn't been insanely regulated except sports? Democrats and Republicans, and normal people, supported an exemption for years due to the fact it wasn't offensive to anyone and people liked their team/super bowl/nba final/whatever. But many sports leagues globally operate without a monopoly, including soccer in the US so to say it can't or shouldn't is ridiculous.