Oklahoma quarterback Baker Mayfield (6) passes against Kansas during the second half of an NCAA college football game in Norman, Okla., Saturday, Oct. 29, 2016. (AP Photo/Alonzo Adams)

Norman, Okla. ? If massive underdog Kansas had any chance of competing on the road at No. 16 Oklahoma Saturday, the Jayhawks’ defense needed to get pressure on Sooners quarterback Baker Mayfield.

However, KU, only sacked Mayfield once, he threw for 236 yards and four touchdowns, and the Sooners destroyed their homecoming foe, 56-3.

Second-year Kansas head coach David Beaty said OU’s offensive line stymied the Jayhawks’ plans to pressure Mayfield.

“That helped ’em,” the coach said. “He had a lot of time back there.”

Sophomore KU defensive end Dorance Armstrong Jr., of course, ended up being the only Jayhawk to bring Mayfield down. Armstrong now has at least one sack in six straight games.

O-line adjustment

Kansas played without regular starting center Joe Gibson at OU.

Beaty said earlier in the week he expected the junior offensive lineman would be able to play against the Sooners.

Instead, redshirt freshman Mesa Ribordy started at center, and sophomore Larry Hughes took over Ribordy’s typical starting spot, at right guard.

With freshman Hakeem Adeniji at left tackle, junior Jayson Rhodes at left guard, Ribordy handling the snaps, and Hughes joining senior D’Andre Banks on the right side, Kansas started its fifth different combination of the season on the O-line.

Norman nightmares

In the program’s inaugural Big 12 game in 1996, Kansas won at Oklahoma, 52-24. However, the Sooners routinely have steamrolled the Jayhawks since, and extended their home winning streak versus Kansas at Gaylord Family Oklahoma Memorial Stadium to six.

After Saturday’s blowout, OU has outscored KU 272-74 during its home streak. Oklahoma averages 45.3 points a game in that span, compared to KU’s 12.3.

The narrowest Kansas loss at OU since the Big 8 became the Big 12 came in 2008. The Jayhawks, ranked No. 16, lost 45-31 to the No. 4 Sooners.

Streaks

The Jayhawks now have lost 42 consecutive games outside of Lawrence. Kansas hasn’t won a Big 12 road game in 34 consecutive attempts.

KU also extended its losing streak in conference play to 17 games.