NEW YORK -- New York Mets outfielder Jason Bay landed on the disabled list on Friday with continued headaches and other effects of a concussion, a week after crashing into the left-field wall at Dodger Stadium while making a catch on Jamey Carroll.
"He's still having some of the same symptoms," manager Jerry Manuel said. "I'm hopeful here in the next couple of days that he wakes up and doesn't have those symptoms."
The move is retroactive to July 26.
Bay played the following two days in Los Angeles, but felt concussion-related headaches on the flight back from the West Coast after the Mets completed their 2-9 road trip.
The Mets promoted Jesus Feliciano from Triple-A Buffalo, where he was leading the International League with a .346 batting average. Feliciano hit .291 with two RBIs in 55 at-bats during an earlier stint with the Mets, but was demoted at the All-Star break to make room for Carlos Beltran's return from the DL.
"It's awesome for me because now I know what it takes. I got to learn a lot of things," Feliciano said Friday. "I'm more comfortable now and hopefully I can help the team."
After signing a $66 million, four-year contract in the offseason, Bay is yet to deliver the kind of power and production New York expected. He is batting .259 with six home runs and 47 RBIs after setting career highs with 36 homers and 119 RBIs for Boston last year.
Bay's injury represents the latest concussion issue for the Mets, who were criticized for the way they handled outfielder Ryan Church in 2008 after he sustained his second concussion in less than three months.
Star slugger David Wright also missed 15 games with a concussion last year after he was hit in the head by a fastball from San Francisco pitcher Matt Cain. Wright said he's spoken to Bay a few times this week, mostly to see how he's feeling. Bay was not at the ballpark Friday.
"By no means am I an expert on concussions, but I'll be the first one if he has any questions or needs any advice," Wright said. "Right now the best thing is just to relax. You want Jason in the lineup, but at the same time you understand that, after I went through it, it's probably a good thing to get some down time to make sure everything is 100 percent completely gone before you try to do anything again and maybe make it worse.
"So I think it's probably the right decision, as far as just making sure that it's a two-week thing and then hopefully no effects after that."
In another move, New York traded minor league first baseman Mike Jacobs to the Toronto Blue Jays for a player to be named. Jacobs was at Buffalo after beginning the season with the Mets.
Right-handed reliever Sean Green will continue his rehab assignment with Buffalo after pitching in a combined seven games with Class-A St. Lucie and the rookie-level Gulf Coast Mets.
Green has been on the DL since April 8 with a strained muscle on his right side.
Adam Rubin covers the Mets for ESPNNewYork.com. You can follow him on Twitter. Information from The Associated Press was used in this report.