Clay Matthews is filing a grievance against the Los Angeles Rams over $2 million in unpaid guarantees, according to sources.

Matthews and Todd Gurley, who were released by the team in March, have publicly vented their frustrations over non-payments.

The linebacker's two-year deal with the Rams included $5.5 million in guarantees, and he is still owed a $2 million roster bonus.

A source involved said the Rams could argue that language in the contracts of Gurley and Matthews allows a short-term deferral of payment for tax purposes.