O.T. Genasis Open To Fighting Lamar Odom, Show Me The Money!

Lamar Odom might have his next boxing opponent ... 'cause O.T. Genasis tells TMZ Sports he'd consider stepping in the ring with the NBA champ -- if the money's right. 41-year-old Lamar is fresh off whooping J.Lo's ex-hubby, Ojani Noa, in his…