The FBI sting operation that snared state Sen. Leland Yee and Chinatown tong leader Raymond “Shrimp Boy” Chow was snooping around an even bigger Bay Area name – 49ers football legend Joe Montana – but came up empty, according to informed sources.

Montana, the Hall of Fame quarterback who has dabbled in development deals since retiring from football after the 1994 season, was contacted by an undercover FBI operative about an unspecified business proposition during the Yee-Chow investigation, according to one source familiar with the case.

“Nobody has said he did anything wrong,” said the source, who requested anonymity because of the sensitivity of the case.

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