The Steelers opened as home underdogs for their Week 15 matchup with the Buffalo Bills on Sunday Night Football but the line moved 2.5 points overnight.
The visiting Bills opened as one-point favorites over the Steelers as 9-4 Buffalo plays its first game on Sunday night in over a decade.
The game will have huge playoff implications, as the 8-5 Steelers could pass the Bills for the top AFC Wild Card spot, but the loser will have to hold off 8-5 Tennessee for the final playoff position.
After opening as 1-point favorites, the Bills are presently 1.5-point underdogs.
The Steelers have been home underdogs four times this season, beating the Cleveland Browns and Los Angeles Rams outright and pushing the spread while losing to the Baltimore Ravens.
The Steelers are 7-4-2 against the spread on the season, 4-2-1 at home and 4-2-1 as underdogs.
Buffalo has been a road favorite twice already this season, beating and covering the New York Jets in Week 1 and the Miami Dolphins on Nov. 17. The Bills are 8-4-1 against the spread on the season, 5-0-1 on the road and 4-3 as favorites.