Rodriguez produced a special display averaging nearly 109 to breeze past Bradley Brooks 6-1 with Jelle Klaasen currently locked at 4-4 against fellow Riley's qualifier, Mark Rice in the second game up.
Tournament centre 2022 UK Open Darts: Schedule, results, prize money breakdown, TV Guide and live stream
Over on Stage Two, the games are already coming thick and fast with Jules van Dongen edging a scrappy affair against Mario Vandenbogaerde with a super 124 checkout on the bull to win.
While Fabian Schmutzler saw off Kai Fan Leung in a decider and Sebastian Bialecki breezed past Matt Campbell as the young guns rule the roost so far.
Over on the multi-board room, there have been wins for the likes of Paul Hogan, John O'Shea, Jim Williams, Richie Burnett, Damian Mol, Ryan Harrington and Ted Evetts with second round action beginning.