Access the Mets beat like never before Join Post Sports+ for exciting subscriber-only features, including real-time texting with Mike Puma about the inside buzz on the Mets. Try it free A closer on a team sinking by the day often doesn’t have much to do. Edwin Díaz hadn’t pitched in six days before he got the final four outs in Wednesday’s 7-3 win over the Brewers in the nightcap of a doubleheader at Citi Field. For all their woes — and the Mets have plenty — Díaz isn’t one of them. In his past 22 games, he has given up just one run on 10 hits and six walks, while striking out 31. “I know I hadn’t pitched in a week, but I’ve learned how to keep my body ready,” Díaz said after picking up the