PHOENIX -- Marlins reliever Burke Badenhop was struck on the left knee by a comeback liner off the bat of Arizona's Gerardo Parra on Thursday night.

In a scary moment in the fifth inning at Chase Field, Parra ripped a liner up the middle. The ball squarely hit Badenhop, who collapsed to the ground. Justin Upton, on second at the time, advanced to third, and Parra reached on the infield single.

The injury was called a left knee contusion. X-rays came back negative, and he is listed as day-to-day.

Immediately, Badenhop was examined by Marlins trainer Sean Cunningham. The right-hander remained on the mound, trying to regroup. But after a few minutes, he was helped up. Under his own power, he limped to the dugout.

The play occurred with the Diamondbacks leading, 6-0. Badenhop was pitching in relief of starter Andrew Miller, who was lifted after 2 2/3 innings.

Brian Sanches relieved Badenhop, who was appearing in his 21st game.

If Badenhop goes on the disabled list, Tim Wood, who was optioned to Triple-A on Wednesday, could be an option to return.