We're in the full swing of things with NFL Week 4 underway following the Bengals' easy defeat of the Dolphins on Thursday night. Seasons aren't built on four games, but you can know a lot about teams after a quarter of the season.

You also know a little bit about teams heading into Week 4 -- and the lines reflect that. We saw how the lines opened on Sunday and Monday, but let's look at the line changes heading into the weekend.

Reminder that you can check all our NFL expert picks right here.

Indianapolis Colts vs. Jacksonville Jaguars in London (Opening line: Jaguars -2.5 points, Monday line, Colts -2)

Current line: Colts (-2.5). There's nothing better than Sunday morning football. Except the look on your wife's face at 8:35 a.m. ET when you tell her for the first time all week about Sunday morning football. There are plenty of trends to look at, but this is a crapshoot game, a weird "wow it's early" sort of thing you shouldn't try to predict. Just pick a team and go.

Tennessee Titans at Houston Texans (Opening line: Texans -4.5 points, Monday line: Texans -6.5)

Current line: Texans (-5). There's some major J.J. Watt line movement here. You'd think everyone would know Watt isn't worth a full 1.5 points -- Nick Kostos and I talked about this on the Roughing the Passer Podcast this week, which is embedded below -- but somehow the point total dropped in a big way.