I've thought about it for a couple of days, and here is the list of quartertback injuries I can recall or that I have heard about at UK.

(1) Rick Norton, broken leg (or arm) at Houston, 1964.
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(2) Mike Fanuzzi, broken leg at Tennessee, 1974;
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(3) Bill Ransdell, injured knee, 1985;
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(4) Pookie Jones, sprained ankles, 1993.
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(5) Billy Jack Haskins, dislocated shoulder, Tennessee, 1985.
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There was some talk of Couch having a sore elbow or shoulder in 1996 that no one believed. And Lorenzen got banged up a time or two, but missed no games for injury as I recall.
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Can anyone think of others? It looks like we average one every tens years, or so.