The changes have begun.

Three days removed from a collapse that stained the Mets’ years-long attempt at reinvention , the organization parted ways with one of its coaches. Catching and strategy coach Glenn Sherlock is retiring, a source close to Sherlock confirmed.

And it might very well be a sign of things to come. Monday, president of baseball operations David Stearns said the organization intended to retain manager Carlos Mendoza, but offered no such assurances for the rest of his staff.

“We’re going to go through an evaluation of our entire coaching staff,” Stearns said. “We’ll do that over the course of the coming days to a week and then we’ll make our decisions there.”

Sherlock retires after a 30-year professional coaching and managerial career that included two stints with the

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