The famous "Friday Night Lights" battle cry -- "Clear eyes, full hearts, can't lose" -- does not apply to the marriage of one of its stars ... LaMarcus Tinker just filed for divorce.
Tinker and his wife, Shari Butler-Tinker jointly filed the petition to end their 2-year marriage on Feb. 28.
According to the docs ... LaMarcus -- who played Dallas Tinker on 'FNL' -- earned $7200 a week before roles dried up in 2012, but now collects about $2100 a month in royalties.
Shari is also an actress and dancer, but only pulls in $163 a month.
Joint filing, little money to haggle over ... this has all the ear markings of a rare quickie Hollywood divorce.