The spring window of the transfer portal is not as busy as its chaotic December counterpart. It nevertheless could produce a lucrative windfall for Mark Stoops’ Kentucky football team. Former Oregon State running back Damien Martinez is the most talented player available in the transfer portal, according to On3. Kentucky is one of the top schools he’s considering. Martinez announced his intent to enter the transfer portal last week. Today he tells On3’s Hayes Fawcett he will visit five schools, including Kentucky. The Cats will get one of his last visits. The schedule: Arizona: April 17-18Miss…