A replay remedy is now available if an NFL official misses a defensive back plowing into a receiver two seconds before the ball arrives. That's the easy part of adding pass interference calls (and no-calls) to the league's replay system on a one-year trial basis.
The hard part, of course, is navigating the dozens of other plays per game that involve clear contact but fall short of the mauling we saw at the end of the NFC Championship Game. What will the NFL do about those plays? How will it define a "clear and obvious" restriction on playing the ball, one that will guide its resolve to overturn decisions on the field?