Carlos Pena's walk-off single in the ninth spoiled an Opening Day win for the Yankees, and the first save opportunity of what is likely Mariano Rivera's farewell season, as the Tampa Bay Rays rallied for a 7-6 win at Tropicana Field.

Leading 6-5 in the ninth, Rivera (0-1) allowed a lead off single to Desmond Jennings, who promptly scored on an RBI double from Ben Zobrist to tie it at 6-6. Mo intentionally walked the next two batters, then retired two before Pena battered the walk off winner off of the left field wall. Pena's huge day included a first inning grand slam off Yankee ace C.C. Sabathia who was without his best stuff - eight hits and five earned runs while striking out seven in 6.0 innings.

New York was lead by DH Raul Ibanez who drove in four runs, including a three run homer in the third inning that put the Yanks up 6-4.

Fernando Rodney (1-0) worked a scoreless ninth for the Rays and was credited with the win.

Saturday's match up features David Price for Tampa Bay and Hiroki Kiroda for New York.