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With Cardale Jones replacing the injured J.T. Barrett at quarterback for Ohio State this week the Buckeyes have become increasing underdogs for Saturday's Big Ten Championship Game as we take a look at the college football line moves for Week 15 of the season.

The Buckeyes opened as 3-point underdogs against the Wisconsin Badgers for the Big Ten Championship Game at Lucas Oil Stadium on Saturday, but heading into the weekend that line has moved to Ohio State +4.5 at the sportsbooks. The underdog, though, has covered in each of the first three Big Ten title games according to the Week 15 college football betting trends.

Matchup Reports: Wisconsin vs. Ohio State | Arizona vs. Oregon | Florida State vs. Ga Tech

The title games get underway on Friday night, with Oregon improving from a 13.5-point to a 15-point favorite against Arizona in the Pac-12 Championship Game at Levi's Stadium, and Northern Illinois improving from a 3.5-point to a 6.5-point favorite against Bowling Green in the MAC Championship Game at Ford Field.

Georgia Tech opened as a 3.5-point underdog against Florida State in the ACC Championship Game, with that line having moved to Seminoles -4.5 over the last few days despite Florida State's 3-9 ATS mark on the season. Boise State has gone from -17 to -22 against Fresno State for Saturday night's MWC Championship Game.

And in Big 12 action for Saturday, the TCU Horned Frogs have improved from 30-point to 34-point favorites against Iowa State, while Baylor finally opened at -8 against Kansas State. The Bears vs. Wildcats matchup had been off the board early in the week because of Bryce Petty's head injury; the quarterback expects to play Saturday.

College Football Week 15 Betting Lines at 5Dimes

THURSDAY, DECEMBER 4 UCF at East Carolina (-6.5) (OPEN -6), 7:30pm ET

FRIDAY, DECEMBER 5 Bowling Green vs. Northern Illinois (-6.5) (OPEN -3.5), 7:00pm ET (Ford Field) Arizona vs. Oregon (-15) (OPEN -13.5), 9:00pm ET (Levi's Stadium)

SATURDAY, DECEMBER 6 Iowa State at TCU (-34) (OPEN -30), 12:00pm ET Louisiana Tech at Marshall (-11) (OPEN -12.5), 12:00pm ET Houston at Cincinnati (-7) (OPEN -7), 12:00pm ET SMU at Connecticut (-12) (OPEN -11), 12:00pm ET Oklahoma State at Oklahoma (-20) (OPEN -20), 3:30pm ET Alabama vs. Missouri (+14.5) (OPEN +14), 4:00pm ET (Georgia Dome) Temple at Tulane (+3) (OPEN +4), 7:30pm ET Kansas State at Baylor (-8) (OPEN OFF), 7:45pm ET Florida State vs. Georgia Tech (+4.5) (OPEN +3.5), 8:00pm ET (Bank of America Stadium) Wisconsin vs. Ohio State (+4.5) (OPEN +3), 8:17pm ET (Lucas Oil Stadium) Fresno State at Boise State (-22) (OPEN -17), 10:00pm ET