Throughout the past month, the Mets have bemoaned their lack of a second right-handed slugger to compliment David Wright in their lineup.

In theory, that slugger showed up Tuesday, when the Mets activated Jason Bay from the disabled list and designated infielder Omar Quintanilla for assignment. Sidelined since June 15 with a concussion, Bay slugged .500 against left-handed pitching as recently as last season. As a result, the Mets plugged him right back into their lineup Tuesday against Nationals lefty Ross Detwiler, playing left field and batting fifth.

"I'm just trying to jump in," Bay said. "Obviously things haven't gone right. I've struggled a little bit. I'm not trying to carry the team. I'm not trying to do that. I'm just trying to pitch in."

Bay landed on the disabled list June 15 with his second concussion in a two-year span, suffered tumbling into Citi Field's left-field wall. Though the Mets initially feared that Bay would miss the rest of the season, he shed his symptoms relatively quickly and began playing in rehab games, going 3-for-10 with four walks for Triple-A Buffalo.