Struggling White Sox lefty Dallas Keuchel understands the upcoming month of September will likely determine his playoff role on the team after lasting just one inning on Friday night against the crosstown Cubs.

"My last 10 starts have been ugly, to say the least," Keuchel said on Saturday. "There's probably only a handful of games where I've been my true self. I need to lock it in this last month. That's for sure."