http://mets.locals.baseballprospectus.com/2016/04/26/the-next-mets-pitching-prospect-to-develop-a-slider-is-robert-gsellman/ Just another Baseball Prospectus Local Sites site Sat, 08 Dec 2018 07:19:56 +0000 hourly 1 http://wordpress.org/?v=4.1.1 http://mets.locals.baseballprospectus.com/2016/04/26/the-next-mets-pitching-prospect-to-develop-a-slider-is-robert-gsellman/#comment-96 Wed, 04 May 2016 10:05:55 +0000 http://mets.locals.baseballprospectus.com/?p=472#comment-96 […] we have an explanation as well. He’s learning the Warthen slider. It’s still a work in progress, but there is progress, at least enough to impress Jeff […]

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