Alex Mack is voiding the three years remaining on his contract with the Cleveland Browns and is set to become a free agent.

Mack had $24 million remaining on the deal, and could once again become the NFL's highest-paid center. A return to Cleveland, the source told Schefter, is still "very probable."

Mack visited with the Browns in February. He met with coach Hue Jackson, director of football operations Sashi Brown and new offensive line coach Hal Hunter to see the direction of the Browns.

Brown said talks were about Mack's role and the new leadership's "vision for winning."