The Chicago Cubs don't believe that Jeff Samardzija's recent struggles are related to his uncertain contract situation.

"Last year he had a bad month as well," Jed Hoyer said. "He got through it and threw really well at the end of the season. I'm hopeful he's able to get through this down stretch and get going."

Samardzija, who turned down a team-friendly extension offer last winter, has allowed 30 earned runs in 40 innings (6.75) in seven starts since the end of June.