Full-back Osborne’s try hauled Ireland level before Prendergast took centre-stage and dashed Wales’ hopes of ripping up the form-book by beating a team 10 places above them in World Rugby’s official rankings.
Prendergast delivered priceless goods just three months into his Test career, and Ireland knew they had experienced a monumental scare against opponents without a Test win since October 2023.
Attention will quickly turn to France’s Aviva Stadium visit on March 8, when captain Caelan Doris could be back in the mix after missing the Wales game because of a knee injury.
Jamie Osborne hailed match-winner Sam Prendergast’s unflappable temperament after he kept Ireland on course to make Six Nations history.
A title hat-trick, which has never previously been achieved, and the Grand Slam will be guaranteed if Ireland win their remaining games against France and Italy in March.