Online Grinders: Mark "Guma" Rivera is an accomplished online pro playing under "gumasta" name on Pokerstars. He shared his thoughts about playing poker for a living http://somuchpoker.com/interview-mark-rivera-about-playing-poker-for-living/
Online grinders: Marc “Guma” Rivera about playing poker for living
Marc "Guma" Rivera is an accomplished online pro playing under "gumasta" name on Pokerstars. He won a PLO8 SCOOP event in 2013.
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