The New England Patriots, San Francisco Giants and Tampa Bay Rays are among the 379 companies that have signed on to an amicus brief urging the Supreme Court to strike down state bans on gay marriage.

The nation's highest court will hear arguments in a case challenging bans in four states – Ohio, Tennessee, Michigan and Kentucky – on April 28, with a ruling expected in June.

Such bans “hamper employer efforts to recruit and retain the most talented workforce possible in those states,” the companies say in their friend-of-the-court brief.

Gay couples can currently marry in 37 states, plus the District of Columbia. (Conflicting rulings in Alabama have blocked such weddings for now.)

“San Francisco is the epicenter of the marriage equality movement and it is only fitting that its professional sports team would join in this effort,” Giants President Larry Baer said in a statement. “The San Francisco Giants are proud to sign the brief because it speaks directly to our core values of equality and social justice for all.”

Brian Auld, president of the Tampa Bay Rays, said that it was important for his organization to send a “signal of inclusion.”