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AP FILE - This Sept. 15, 2012, file photo shows BYU quarterback Riley Nelson (13) looking for a receiver during the first quarter of an NCAA football gam - Photo

FILE - This Sept. 15, 2012, file photo shows BYU quarterback Riley Nelson (13) looking for a receiver during the first quarter of an NCAA football gam

Tuesday September 25, 11:13 PM
FILE - This Sept. 15, 2012, file photo shows BYU quarterback Riley Nelson (13) looking for a receiver during the first quarter of an NCAA football game against Utah, in Salt Lake City. After raving about the past success of BYU senior quarterbacks, the Cougars very well could start a freshman against a Norm Chow-coached Hawaii team Friday night in Provo. Senior Riley Nelson acknowledged the pain of an unspecified back injury has been problematic both mentally and physically in stinging back-to-back losses to Utah and No. 24 Boise State. (AP Photo/Rick Bowmer, File)