11 things that have happened in the NFL since Aldon Smith last played

Aldon Smith is returning to the NFL as a Dallas Cowboy after being out of the league since 2015.

Pass interference calls are reviewed

John David Mercer-USA TODAY Sports

Coaches had the abilities to challenge plays when Smith was in the league. However, thanks to a non-call in the Rams-Saints NFC Championship after the 2018 regular season, the league opened its rules to allow pass interference or non-pass interference calls to be questioned.