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Frank Franklin II, Associated Press
San Francisco Giants' Hector Sanchez, right, hits a single to drive in a run during the tenth inning of a baseball game against the New York Mets, Friday, April 20, 2012, in New York.

NEW YORK — Hector Sanchez hit a go-ahead single in the 10th inning off Frank Francisco, and the San Francisco Giants came back after blowing the lead in the ninth and just hung on to beat the New York Mets 4-3 Friday night.

Angel Pagan homered in his return to Citi Field as San Francisco built a 3-0 lead in the third for Barry Zito, but solo home runs by Jason Bay in the fourth and rookie Kirk Nieuwenhuis in the fifth started New York's comeback.

With closer Brian Wilson out for the year following elbow surgery, Santiago Casilla and Javier Lopez combined to allow the Mets to send the game to extra innings on Josh Thole's tying single.