Paul Klee: Coulda, woulda, shoulda? Broncos running backs make you wonder

Denver Broncos quarterback Peyton Manning hands off to rookie running back Montee Ball during NFL football training camp, Monday, July 29, 2013, in Englewood, Colo. (AP Photo/Jack Dempsey)
Denver Broncos quarterback Peyton Manning hands off to rookie running back Montee Ball during NFL football training camp, Monday, July 29, 2013, in Englewood, Colo. (AP Photo/Jack Dempsey)
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