Texas Tech keeps QB mystery under wraps with Kansas visiting

FILE - In this Oct. 11, 2018, file photo, Texas Tech's Jett Duffey (7) looks for a receiver during the first half of an NCAA college football game against TCU, in Fort Worth, Texas. Kansas plays at texas tech on Saturday, Oct. 20. (Brad Tollefson/Lubbock Avalanche-Journal via AP, File)

FILE - In this Sept. 15, 2018, file photo, Texas Tech coach Kliff Kingsbury reacts to a play during an NCAA college football game against Houston, in Lubbock, Texas. Kansas plays at Texas Tech on Saturday, Oct. 20. (Sam Grenadier/Lubbock Avalanche-Journal via AP, FIle)

FILE - In this Sept. 15, 2018, file photo, Kansas head coach David Beaty talks to his players during the second half of an NCAA college football game against Rutgers, in Lawrence, Kan. Kansas plays at Texas Tech on Saturday, Oct. 20. (AP Photo/Charlie Riedel, File)