Roessler most recently served as the Director of Player Development for the Yankees but has extensive prior coaching experience. He served as a minor league hitting coach in the White Sox, Expos, and Pirates organizations. He then was the major league hitting coach for the Expos for two years. From there he became the minor league hitting coordinator for the Astros before finally joining the Yankees.
The position of assistant hitting coach is a relatively new one for the Mets and other teams. It was previously held by Luis Natera, but he was let go at the end of the season. Roessler is not the only one to jump from the Yankees to the Mets this offseason as he is joined by Kevin Long who was hired to be the hitting coach.