Three things: Undoubtedly, there will be competition, even if it is just UDFAs. If somebody clearly outplays Kuhn, he could be gone little or no cap damage. Secondly, with all those quality RBs, McCarthy could put together some kind of scheme or cross-training where they keep no true fullback at all. That would seem doubtful, since Starks, Harris, and Franklin don't even resemble fullbacks, but who knows. Third, we've seen TEs fill that role a lot in the past. If there's a close call roster-wise, I wouldn't mind at all seeing him cut.

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Kuhn is likely to stick around simply because of his blocking ability. No other running back has shown the ability to consistently protect Aaron Rodgers like John Kuhn has. The coaching staff trusts him. Until someone proves they can pass protect better than Kuhn, he'll stick around, imo. At least for another season or two. He also offers special teams contributions, but I think the protection is his best asset.