If you are serious about winning your fantasy league football championship, stay on top of your fantasy football team throughout the year.

Each week during the NFL fantasy football season, KFFL brings you its Fantasy Football Waiver Wire, which breaks down players to pick up. Be aggressive when picking up fantasy football free agents. Even if you do not need a player, you can tuck him away for depth or block others from adding him to their fantasy football team.

Note: Percentage of polled leagues in which player is available in parentheses

Fantasy football free agents: Priority additions

The following players should be high on your radar and are worthy of being added immediately to your fantasy football team.

Russell Wilson, Seattle Seahawks (40 percent)

Commanding the O

Wilson must've felt like he was back at Wisconsin in Week 14 as Bret Bielema ran up the score on Indiana. Instead, it was the Arizona Cardinals playing the part of the hapless Hoosiers in a 58-point shellacking. With the game out of hand early, Wilson completed just seven passes for 148 yards; he also threw his first interception since Week 8.

At face value it may look like a step backward, but clearly this was an aberration, and the Seahawks will need more from Wilson in Week 15 when they take on the Buffalo Bills. The rookie remains a solid addition.

Fantasy football free agents: Look to acquire

The following players will have greater significance in deep fantasy football leagues. In shallow fantasy football leagues, they are not as high of a priority but should be considered based on your fantasy football team's needs.

Nick Foles, Philadelphia Eagles (82 percent)

Foles' maturation has been both steady and rapid since taking over for Michael Vick (concussion) in Week 10. The team keeps putting more and more on his plate, and he continues to prove equal to the task. Over the past two games, Foles has thrown for 632 yards, three touchdowns and no interceptions; he even ran for a score.

It's a quick turnaround for the Eagles, who host the Cincinnati Bengals on Thursday night, but the third-rounder could prove a capable replacement for owners relying on Chicago Bears' Jay Cutler (neck) or Washington Redskins' Robert Griffin III (knee) if their injuries prove serious.