Brewers closer Corey Knebel was placed on the disabled list Friday due to a left hamstring injury and is expected to be out at least six weeks.

All in all it's about the best news the Brewers could expect after Knebel collapsed while holding the hamstring after throwing a pitch in Thursday's loss to the Cubs.

"It really worried me yesterday, but today I woke up and it felt a lot better," Knebel said before Friday's game against the Cubs.