The road to the second round of the playoffs might be, well, the road. Visiting teams are favored in all the wild-card games.
It's an unusual dynamic that owes as much to the oddsmakers not believing in division winners Houston and Washington, plus a strong backing by the bettors (and the public in general) for the Steelers and Seahawks.
Historically, the host teams are 65-35 since 1990 in this round. The most recent time two visitors won wild-card matches was in 2013, when three did: San Diego at Cincinnati, San Francisco at Green Bay, and New Orleans at Philadelphia.