Waiver-wire additions are key to having a solid fantasy football team throughout the season, and there are a few key players to try and pick up this week.
Last week, there were key players like James Starks and Eddie Royal, but there is a whole new group of players to keep an eye on.
Below are the biggest players still available in most leagues on the waiver wire, and you need to make sure to grab them as quickly as possible.
Note: All "percent owned" and scoring numbers are provided by ESPN.com
Alex Smith, QB, Kansas City Chiefs (39.8 percent owned)
Remember when the Kansas City Chiefs went 2-14 and had the No. 1 overall draft pick in 2012? Yeah, this team is different.
A lot of that has to do with Alex Smith, who has come in and done a great job at quarterback. He hasn't put up super crazy numbers, but he's an excellent pickup as a long-term bench QB or if your starting quarterback is on a bye week.
So far this season, Smith has had 669 yards and four touchdowns without an interception through the air. He's put up 16, 21 and 13 points, respectively, through the first three weeks.
What a lot of people aren't talking about is the fact that Smith has shown off some surprising ability with his legs so far. He's already ran for 114 yards, giving him an extra 11 points in standard leagues.
This could be an even bigger week for Smith as the Chiefs are going against the New York Giants. The Giants have struggled defensively, giving up an average of just over 38 points per game. Opposing quarterbacks have had eight total touchdowns already.
With how good the Chiefs are looking right now, Smith is going to have some big games, and if you don't feel confident in your QB1 right now, this is a really smart addition.
Jason Snelling, RB, Atlanta Falcons (23.5 percent owned)
With Steven Jackson out for the next couple of weeks, there's some real value for Snelling, especially in deeper 12- or 14-team leagues.
While Snelling hasn't gotten a lot of touches, he's still become a legitimate red-zone threat, and those are the kinds of guys who can put up some solid points. Over the past two games, Snelling has had 11 and 16 points, putting up a touchdown in both games. Last week against the Miami Dolphins, Snelling had 11 carries for 53 yards along with four catches for 58 yards and a touchdown through the air.
Jacquizz Rodgers will be splitting carries with Snelling while Jackson is out, but so far he's yet to put up the points that Snelling has. He had 86 yards on 18 carries last week, but Snelling was the one to get the look in the red zone.
While Snelling isn't a safe RB2 option, he could be a valuable flex player. He's not going to guarantee double-digit points, but like the past two weeks, he's found ways to get into the end zone, and that's really all you can ask for from a flex player.
Kenbrell Thompkins, WR, New England Patriots (45.0 percent owned)
He may not have looked that good against the New York Jets, but Thompkins certainly looked mighty fine against the Tampa Bay Buccaneers.
It was a productive Week 3 outing for Thompkins, who put up 16 points. He had just three catches, but they went for 41 yards and two scores.
With Rob Gronkowski and Danny Amendola out, there aren't many other options for Tom Brady to throw to, but he really seems to like Thompkins so far. The rookie receiver has already been targeted six times in the red zone, and that number will continue to climb as the Patriots' other playmakers are out.
Keep in mind that this isn't going to be a long-term option. Thompkins' role will likely decrease considerably once the other guys come back.
However, this is a great pickup for this week and possibly next. The Patriots are going against a very inexperienced secondary, and that means that Brady is likely going to be throwing the ball early and often with success.
If you're looking for a WR2 or Flex player for this week, Thompkins is your guy.