Trouble with Webscrapping in R using XML Package

I've used the XML package successfully to scrap multiple websites, but I'm having trouble creating a data frame from this specific page:

library(XML)

url <- paste("http://ift.tt/1txbGL2", sep = "")
df1 <- readHTMLTable(url)

print(df1)

> print(df1)
$`NULL`
NULL

$`NULL`
NULL

$`NULL`
             Player Pos         Injury           Game Status
1       Dickson, Ed  TE          thigh              Probable
2      Jensen, Ryan   C           foot              Doubtful
3     Jones, Arthur  DE        illness                   Out
4   McPhee, Pernell  LB           knee              Probable
5     Pitta, Dennis  TE dislocated hip Injured Reserve (DFR)
6  Thompson, Deonte  WR           foot              Doubtful
7 Williams, Brandon  DT            toe              Doubtful

$`NULL`
           Player Pos        Injury Game Status
1  Anderson, C.J.  RB          knee         Out
2   Ayers, Robert  DE      Achilles    Probable
3   Bailey, Champ  CB          foot         Out
4     Clady, Ryan   T      shoulder    Probable
5  Dreessen, Joel  TE          knee         Out
6    Kuper, Chris   G         ankle    Doubtful
7 Osweiler, Brock  QB left shoulder    Probable
8     Welker, Wes  WR         ankle    Probable

$`NULL`

etc

If I try to coerce it I get this error:

> df1 <- data.frame(readHTMLTable(url))
Error in data.frame(`NULL` = NULL, `NULL` = NULL, `NULL` = list(Player = 1:7,  : 
  arguments imply differing number of rows: 0, 7, 8, 6, 9, 1, 11, 4, 12, 5, 21, 3, 2, 15

I'd like all of the injury data (PLAYER, POS, INJURY, GAME STATUS) for all of the teams.

Thanks in advance.