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Carl served in the US army during World War II.
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His character in "The Donna Reed Show" (1958), was ranked #16 in TV Guide's list of the "50 Greatest TV Dads of All Time" [20 June 2004 issue].
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Carl was tailback in the 1938 Sugar Bowl of the Carnegie Institute of Technology (now called Carnegie Mellon University) versus Texas Christian University.
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Carl is a member of the Beta Theta Pi Fraternity at Carnegie Institute of Technology (now called Carnegie Mellon University).