Digging into some things I found this....
Since 2011...
Home Teams / Off bye / Regular season / favored by 12 or more = 0-7 ATS with -13.29 margin.
Suggests to bet the Dolphins +14.5 on MNF vs the Steelers. (Personally I think line should be more like 12)
Skeptical because it's the Dolphins? This trend was 0-6 until Bills failed to cover this week vs....None other than the Dolphins
Of those 7 games...the underdog of 12 or more won OUTRIGHT twice!