text: Mets catcher d'Arnaud to 7-day concussion DL
  1774dAdam Rubin
  Travis d'Arnaud to concussion DL
  NEW YORK -- New York Mets catcher Travis d'Arnaud, who was struck on the top of the head with Alfonso Soriano's backswing in the ninth inning on Tuesday, has landed on the seven-day concussion disabled list.
  "He's still feeling the effects," general manager Sandy Alderson said Thursday. "He stayed in the game [Tuesday] and there weren't any strong indications there was a problem that night. It was when he came back the next morning, he had some lingering effects. Then we began to exercise and those symptoms reemerged more strongly."
  Manager Terry Collins said d'Arnaud setting up close to the plate may place him in more danger of getting struck with backswings, but also results in more strike calls.
  "I've always said good catchers get under the hitter," Collins said. "And so they're susceptible to backswings. But the closer you are to the plate, you get strike calls. There's a grading system out there now that monitors catchers who get called strikes. He's at the top of the group."
  Centeno, 24, hit .273 with one homer and 11 RBIs in 77 at-bats with Las Vegas.
  Earlier in the day, the Mets officially promoted left-handed reliever Josh Edgin from Las Vegas. He replaces right-hander Kyle Farnsworth, who was outrighted off the roster late Wednesday.