Cliff Avril and Marshawn Lynch did one last thing as teammates before Beast Mode headed off to Oakland ... and for the people of Haiti, it's better than anything the men ever did on the field.
Cliff has been down in Haiti building schools with his Cliff Avril Family Foundation, and he talked to TMZ Sports ... telling us it wouldn't have been possible without an assist from Money Lynch.
"Marshawn put me in contact with the right people for building the school.