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In page Craig Sager:

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Sager was a 1973 graduate of Northwestern University in Evanston, Illinois where he earned a bachelor's degree in Speech.[5] He was a member of the Delta Tau Delta fraternity.[6] After little success on the school's football and basketball teams, Sager found his calling by donning the garb of Willie the Wildcat, the school's mascot, for three years — a foreshadowing of his professional sports entertainment career.[5]