It's hard to call Kim Kardashian a bad luck charm per se. For Reggie Bush, 2009 was a lackluster year for his individual stats, but towards the end of the season he managed to accomplish a few career highs. On a greater note, during the 2009-2010 season, the Saints won the Super Bowl. However, since then he's bounced to other teams and was most recently acquired by the Detroit Lions.
Kris Humphries went from averaging 13 points a game to 5 points a game. Not terrible, if you're a rookie. Humphries has been in the league since 2004 and one could say his decline in recent years might be attributed to being married for 72 days and getting called out by the likes of Kanye West in hit songs.