Injury flagged players are usually identifiable as outliers in these chars. This week in WR, Danny Amendola is still questionable, which also explains the high variance of Kembrell Thompkins.
As you can see, the WR rankings this week are not as tiered as they usually are. They are fairly well behaved until WR45 or so, where it starts to get noisy.
Tier 1: Calvin Johnson, Dez Bryant, Demaryius Thomas, A.J. Green
Tier 2: Brandon Marshall, Julio Jones, Victor Cruz, Randall Cobb, Jordy Nelson, Wes Welker, Andre Johnson, DeSean Jackson
Tier 3: Larry Fitzgerald, Eric Decker, Josh Gordon, Torrey Smith, Marques Colston
Tier 4: Anquan Boldin, Steve Smith, Hakeem Nicks, Reggie Wayne, James Jones, Mike Wallace, Roddy White, Danny Amendola
Tier 5: Cecil Shorts, Brian Hartline, Steve Johnson, Justin Blackmon
Tier 6: Julian Edelman, Dwayne Bowe, Kenbrell Thompkins, DeAndre Hopkins, Alshon Jeffery
Tier 7: Eddie Royal, Tavon Austin, Ty Hilton, Nate Washington, Denarius Moore, Chris Givens, Michael Floyd, Miles Austin, Vincent Brown, Santonio Holmes
Tier 8: Golden Tate, Marlon Brown, Rueben Randle, Robert Woods, Stephen Hill
Tier 9: Kendall Wright, Jeremy Kerley, Austin Pettis, Donnie Avery, Ryan Broyles, Rod Streater, Andre Roberts, Brandon LaFell, Sidney Rice, Riley Cooper
Tier 10: Terrance Williams