All of the seven remaining undefeated NFL teams had impressive wins in Week 3, as every 3-0 squad covered the point spread. But the way some of the unbeaten teams have played is still not reflected in the Week-4 betting lines.

The undefeated Atlanta Falcons are less than a touchdown favorite against the visiting Houston Texans, according to The 3-0 Cincinnati Bengals are also hosting a 1-2 team, and they are giving four points to the Kansas City Chiefs. The Green Bay Packers are giving the San Francisco 49ers 8.5 points, making them the biggest favorites of all the unbeaten teams.

There’s no such thing as a “sure thing” when it comes to gambling, but here are the three best bets for Week 4 of the 2015 NFL season.

Arizona Cardinals (-7)

The Week 4 betting line still doesn’t give Arizona the respect they deserve, making it an easy decision to lay the seven points against the St. Louis Rams. No team has been as dominant as the Cardinals, who have outscored their opponents by a combined 77 points. Considering 22 other NFL teams haven’t even scored 77 total points in three weeks, giving a touchdown to a mediocre team in Week 4 is a steal.

St. Louis grabbed some attention with their Week 1 win over the Seattle Seahawks, and they’ve been overvalued since that victory. The Rams were favored in their 14-point loss to the Washington Redskins, and they only scored six points at home in their loss to the Pittsburgh Steelers, who were missing Ben Roethlisberger for most of the second half. With Arizona having the No.1 scoring offense and St. Louis ranking dead last in total offense, expect this game to be decided by double-digits.

Carolina Panthers (-3)

The Panthers are certainly more than three points better than the Tampa Bay Buccaneers. The betting line is only a field goal because Tampa Bay is at home, but considering the Bucs have the worst home-field advantage in football, the game might as well be played on a neutral field. The Bucs haven’t won at Raymond James Stadium since Nov. 17, 2013, and they’ve had a better road record than home record in four of the last six years.

Carolina has quietly established themselves as one of the NFL’s top teams since late last year, winning seven consecutive regular-season games. During that span, they’ve allowed more than 17 points just once. Jameis Winston has looked very much like a rookie quarterback, ranking 28th in passer rating. Only five teams average fewer yards per carry than the Bucs, and the Panthers rank third in yards per carry allowed. The Panthers are the easy pick.

New York Giants (+5.5)

The Buffalo Bills are 2-1, having looked terrific in their wins, only losing to the defending Super Bowl champs. While Rex Ryan's squad might be improved from last year, they are getting more respect than they deserve from a betting perspective, and they are no guarantee to beat the Giants on Sunday.

Tyrod Taylor has a 116.1 passer rating through three games, and the first-year starter won't keep up this unsustainable pace. He’ll likely be without his top two weapons in Week 4, since Sammy Watkins and LeSean McCoy are expected to be out with injuries. The Giants came ever so close to beating the first-place Dallas Cowboys and Atlanta Falcons. New York got its act together with an easy win over the Washington Redskins, and they look poised to pull off the upset in Buffalo.