As expected, the Mets placed outfielder Jason Bay on the disabled list. He was put on the seven-day concussion disabled list but manager Terry Collins said he expects Bay to be sidelined longer than that. Scott Hairston replaced Bay in the starting lineup Saturday night against the Cincinnati Reds. Although veteran Manny Ramirez is available after being released by Oakland on Friday, Collins said the team isn't looking to add any outfielders in Bay's absence. Bay, who slid headfirst into the left-field wall in Friday night's game against the Reds trying to make a catch on Jay Bruce's second-inning inside-the-park home run, was told by doctors to remain home for the next few days and rest. It was the second concussion suffered by Bay in less than two years — he suffered one on Aug. 23, 2010, when he crashed into a wall in Los Angeles. He missed the rest of the season.