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#pounditMonday, September 27, 2021

Dave Roberts: Kenley Jansen velocity decline due to mechanics issue

Kenley Jansen

Los Angeles Dodgers manager Dave Roberts believes that a mechanics issue is the reason for Kenley Jansen’s velocity decline to start the season.

Jansen pitched and took the loss in the Dodgers’ 1-0 defeat to the San Francisco Giants on Friday night. He allowed a solo home run in the ninth to Joe Panik, who has defeated the Dodgers in consecutive 1-0 games on solo shots.

In the outing, Jansen averaged 89.1 mph on his fastball/cutter, per Fangraphs. That’s down four miles per hour from his average last year. Prior to Saturday’s game, Roberts attributed Jansen’s down velocity to mechanics.

When faced with questions about his velocity following Friday’s game, Jansen was dismissive.

It’s not uncommon for a pitcher to not be at peak velocity at the beginning of the season. Sometimes it takes a little time to get into top form. Of course, after pitching 85 innings last season between the regular season and playoffs, Jansen could be having a bit of a hangover.


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