NEW YORK -- Jim Thome is headed back to Baltimore as the designated hitter continues to deal with neck spasms that aren't getting any better, and he is scheduled to undergo an MRI at 11 a.m. ET on Tuesday.

"Usually, after a couple days it will start calming down, but it really hasn't done that," said Thome, who last played Friday and tried to hit prior to Monday's game. "We kind of made a decision that maybe the best thing to do is get a look and see what we're dealing with, and then from there decide a course of action with treatments and if anything else needs to be done."

Thome, who woke up on Saturday with discomfort worse than he's ever had in that area before, has been on anti-inflammatory medication the last few days to try to calm the area down, and he also had trigger-point treatment and a Cortisone injection on Sunday. But he isn't responding as quickly as hoped, and the team wants to get a better idea what they are dealing with.

"It's just a day or two before that takes hold if it's going to help," manager Buck Showalter said of the cortisone and trigger treatment. "[Tuesday] afternoon, we will know what kind of time frame we are dealing with."

Acquired in a trade from the Philadelphia Phillies, Thome has hit .261 with two homers and six RBIs in 18 games with the Orioles. Chris Davis has served as the O's primary DH in his place.

Asked if he remains optimistic, Thome replied, "Yeah, you always have to be. I think this is more of a, 'Let's find out if there's anything in there that's wrong,' than, 'Oh, there's something really bad.' I don't know. I just know the discomfort I'm having, and I think the best thing moving forward with the short amount of time, I want to get back as quick as I can, and that's the reason we're going to do that tomorrow."

Andino could return to O's on Tuesday

NEW YORK -- Robert Andino (left shoulder strain) came through Sunday's game for Triple-A Norfolk with good reports, going 1-for-5 with a single, and if all goes well Monday he will join the Orioles on Tuesday in New York.

"[Triple-A manager Ron Johnson] asked him about coming out of the game about the seventh, eighth inning, [and] he said, 'No, I'm fine,'" manager Buck Showalter said. "[They] said he played well, moved around well."

Andino reported some soreness Monday morning -- which is normal given that he hasn't played in a few weeks -- but otherwise there were no problems. He was scheduled to play again Monday night for Norfolk, and given Andino's rapid progress so far -- he was originally thought to be out three or four weeks -- it's likely he will join the Orioles on Tuesday.

"I'm hoping he feels great after tonight," Showalter said of Andino, who hurt his shoulder diving for a ball on July 15.

The team's Opening Day second baseman, Andino hit .230 with five homers and 21 RBIs in 79 games before landing on the DL. In his absence, the Orioles traded for infielder Omar Quintanilla, and have used him primarily at second base.