Milwaukee Brewers closer Josh Hader was once considered the best reliever in MLB. His nasty left-side delivery and filthy pitches made him an elite presence on the mound. But Hader is laboring to say the least right now. The Brewers closer now has a 4.50 ERA after surrendering 6 runs to the San Francisco Giants on Friday. He ultimately coughed up a walk-off grand slam to Mike Yastrzemski to take a blown save and a loss.

Milwaukee sports writer Drew Olson shared what he believes to be the reason for Josh Hader's brutal struggles as of late.

Given the carnage of late, it’s natural to think that Hader is tipping his pitches. Given the lack of life and horrendous location of said offerings, hitters do not the extra help. The most dominant reliever in ball is in a deep, deep funk.

Olson believes Hader is tipping his pitches. In other words, the Brewers' closer may be giving away what pitch he is throwing prior to throwing it. This would make sense.

Hader's velocity is still relatively sharp and his stuff doesn't look diminished by any means. Sure, his location has been questionable at times. But Mike Yastrzemski was clearly sitting on a fastball/hard sinker on his walk-off grand slam.

The Giants outfielder was all over that pitch.

Josh Hader is an extremely talented pitcher and should figure out a way to turn things around. He commented on his poor performance following his recent rough stretch, per Yahoo Sports.

“I just didn't execute pitches when it comes down to it,” said Hader. “Just over-battling, over-working and not executing the pitches I needed to make.”

The Brewers are hopeful he can rebound soon.