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8/20/2014 9:36 P.M. ET

Mejia unavailable in series finale vs. A's

OAKLAND -- Minor injuries continue to affect Mets closer Jenrry Mejia, who was unavailable to close out Wednesday's win over the A's due to a sore back.

Mejia's back has bothered him for most of this month, though he has pitched through it as often as possible. In reality, it is just one of several concerns; Mejia is also pitching with a hernia, which he plans to have surgically repaired after the season, and recently recovered from a sore right calf.

"It's nothing serious," Mejia said of his most recent ailment. "My back's a little bit tight and I want to be 100 percent."

Though Mejia insists none of his injuries are affecting him on the mound, he has posted an 8.22 ERA over his last eight appearances, converting two of his three save opportunities in that time.

With Mejia unavailable Wednesday, setup man Jeurys Familia recorded the final five outs for his fourth save.

Nieuwenhuis a late scratch due to stiff neck

OAKLAND -- Mets outfielder Kirk Nieuwenhuis was a late scratch from Wednesday's game against the A's with a stiff neck.

Nieuwenhuis, who began feeling neck pain on the Mets' cross-country flight Monday night from New York to Oakland, received a treatment of electrical nerve stimulation on Wednesday morning. He said he was feeling "much better" at the time and apparently convinced manager Terry Collins, who slotted him into the lineup as his starting right fielder.

But Collins altered the lineup shortly thereafter, shifting Curtis Granderson to right field and inserting Eric Young Jr. into left.

Nieuwenhuis, 27, is batting .233 with two homers in 84 plate appearances split amongst four Major League stints. He has spent most of the season at Triple-A Las Vegas.

Collins also gave regular center fielder Juan Lagares a routine day of rest on Wednesday, starting Matt den Dekker at that position.

Eveland gets cortisone injection in left elbow

OAKLAND -- The Mets' recent reliance on lefty specialist Josh Edgin has not been coincidence. Dana Eveland, the only other left-hander in New York's bullpen, is nursing a bout of elbow inflammation -- "tennis elbow," as he called it.

Eveland saw a doctor and received a cortisone injection in his left elbow on Tuesday, saying the next morning that he was already feeling its effects. The Mets hope that Eveland will be ready to return in time for Friday's series opener in Los Angeles.

"He'll be fine on Friday," manager Terry Collins said.

Though Eveland said he has been feeling some discomfort in his elbow for weeks, it grew more acute during an Aug. 12 outing against the Nationals. The Mets rested him for five consecutive games after that, but it wasn't enough to eliminate the issue.

"It's been barking a little bit on and off for the last month and a half, but I've been throwing through it," said Eveland, who posted a 2.00 ERA through July 30 and a 6.75 ERA in seven outings since.

"I've had some days where I felt real good and some other days where I didn't feel as good," Eveland said, "and I feel like my pitching hasn't been as sharp as it had been the first month and a half since I've been here."

Worth noting

• Bartolo Colon, who has been on the bereavement list since Monday to mourn the death of his mother, will return to the rotation Sunday in Los Angeles. Colon will then fly back to the Dominican Republic to attend his mother's funeral, but will not miss an additional start.

Anthony DiComo is a reporter for MLB.com. Follow him on Twitter @AnthonyDicomo. This story was not subject to the approval of Major League Baseball or its clubs.