Washington DC - Professional players unions for the five major US sports leagues called on Monday for lawmakers to reject antitrust exemptions or legal liability shields in new regulations for college athletes.

While compensation for professional players virtually knows no limit, college athletes have only been allowed to begin profiting from their performance and reputation in recent years.

Now, professional players are weighing in as Congress works to develop a national framework for student athlete profit-sharing, with pros saying they felt a duty to protect future union members while they played in college.

"Granting an antitrust exemption to the NCAA and its members gives the green light for the organization and schools to collude and work against student athletes," the unions' statement said.

Athletes Coco Gauff suffers shock first-round defeat at Wimbledon!

Athletes Pacers star Haliburton gets bad news for next season after Achilles tear

"Historically, antitrust exemptions have been used to set prices, limit wages, and restrict access to opportunities provided by open markets, all while shielding abuse from legal recourse."

The joint statement was sent by unions representing MLB, MLS, NBA, NFL, and NHL players.

The House Committee on Energy and Commerce is considering the Student Compensation and Opportunity through Rights and Endorsements (SCORE) Act after a settlement last month ensured NCAA athletes will receive revenue sharing from their schools for Name, Image, and Likeness profits.

In a statement last week Representative Gus Bilirakis, a Florida Republican, said a national framework governing such profit-sharing was long overdue, and praised the SCORE Act saying it "delivers the stability, clarity and transparency" student athletes and colleges need.

A 2021 Supreme Court decision held that the NCAA is subject to antitrust laws.

Athletes Pacers star Tyrese Haliburton's injury revealed after brutal NBA Finals exit

Athletes NFL suspends ex-Ravens kicker Justin Tucker amid bombshell accusations

In their joint statement, the players' unions called for transparency and fair-dealing.

"It is not hard to imagine a situation where NCAA and its members collude to restrict revenue sharing and deny student athletes fair compensation with the confidence of immunity against legal action. Indeed, they have been doing exactly that for decades," they said.

"The NCAA should not have a blank check to impose their will on the financial future of over 500,000 college athletes."