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.

NEW - Alshon Jeffery, Chicago Bears (86 percent)

Jeffery (knee) caught three passes for 57 yards and a touchdown this past Sunday despite battling a knee injury. Durability has been an issue for the South Carolina product all season long, but his physical stature makes him a potentially effective counterpart to Brandon Marshall.

Darrius Heyward-Bey, Oakland Raiders (40 percent)

DHB should be on your team

Even with Darren McFadden back in the lineup, the Raiders remained a pass-happy bunch with Carson Palmer throwing it to teammates and opponents alike. The most consistent beneficiary on the outside has been Heyward-Bey, who has averaged 3.5 receptions, 58 yards and 0.38 touchdowns per game over his last eight. While not phenomenal numbers, he holds value in larger formats.

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.

Andrew Hawkins, Cincinnati Bengals (71 percent)

Injuries have pressed Hawkins back into second banana status in Cincinnati, and in the past three weeks he found pay dirt twice. The issue with Hawkins is that he doesn't work down the field, thus his 14 grabs in that time have only covered 107 yards. Owners in point-per-reception leagues might want to have a look, though.

Jason Avant, Philadelphia Eagles (98 percent)

With DeSean Jackson (ribs) out for the season, Avant has stepped in and produced with rookie Nick Foles under center. He tallied four grabs for 79 yards in Week 13 and then followed that up with a seven-catch, 133-yard performance in their upset win over the Tampa Bay Buccaneers. We all know Andy Reid loves to throw the ball, and with his confidence in Foles on the rise Avant should continue to produce.

Fantasy football free agents: One-week plays

The following fantasy football pickups are for those who need injury or bye week replacements. They are not players you immediately acquire - unless your team is in dire straits. Some have, however, shown some life and should be followed in case they materialize as options beyond their temporary use.

NEW - Dexter McCluster, Kansas City Chiefs (96 percent)

Anyone that heard Gorilla Monsoon do commentary for old WWF matches surely remembers his "irresistible force" meeting the "immovable object" line. Well, this Sunday we have a monsoon of terribleness when the Chiefs (let's just refer to them as the resistible force) meet the Oakland Raiders (the movable object). Folks, something has to give.

That something may be Oakland's leaky pass defense, which has allowed 11 receptions, 177.3 yards and 1.25 touchdowns per game to opposing receivers over the last month. With Dwayne Bowe (ribs) done for the season, McCluster could step in and have a productive afternoon.