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03/05/10 6:13 PM ET

Reyes to be tested for thyroid imbalance

Mets shortstop will be sidelined until results are known

PORT ST. LUCIE, Fla. -- The spring debut of Jose Reyes has been postponed again, pushed back until at least Tuesday. And the reason given this time is specific and sounds a tad ominous. Additional review of blood tests administered on Thursday has suggested the shortstop has a hyperactive thyroid. Reyes is to be retested in New York on Monday, the Mets said on Friday morning, and the results of those tests may not be available until Wednesday. He has been shut down -- no baseball activity whatsoever -- at least until the results are known.

Reyes is to leave for New York on Saturday. When he left the ballpark on Friday, it was with an expression far more serious than the wall-to-wall smile that is customarily his.

"This is not what I want to be doing," Reyes said. "I am disappointed."

General manager Omar Minaya said the Mets' doctors in New York want to examine and retest Reyes. Minaya indicated he was unaware whether they had detected an anomaly not found by doctors who read the results of the test administered on Thursday. Reyes was scratched from the lineup on Thursday and later cleared to play Friday. He arrived at the Mets' complex on Friday prepared and "excited" to play.

"I went outside to start stretching," Reyes said. "And [trainer] Ray [Ramirez] told me I had to come in.

"I have to be concerned about it and find out what's going on. This is important. We're not talking about my leg. We're talking about my health, so I have to be concerned about it. It can be dangerous for me."

On its Web site, Webmd.com characterizes hyperthyroidism in this way: It "means your thyroid makes too much thyroid hormone. Your thyroid is a gland in the front of your neck. It controls your metabolism, which is how your body turns food into energy. It also affects your heart, muscles, bones and cholesterol.

"Having too much thyroid hormone can make a lot of things in your body speed up. You may lose weight quickly, have a fast heartbeat, sweat a lot or feel nervous and moody. Or you may have no symptoms at all. Your doctor may discover that you have hyperthyroidism while doing a test for another reason.

"Hyperthyroidism is easily treated. With treatment, you can lead a healthy life. Without treatment, hyperthyroidism can lead to serious heart problems, bone problems and a dangerous condition called thyroid storm."

Reyes said he experienced no symptoms.

"I don't feel any different. I feel good," Reyes said. "This is the first time for me. The results have always been the same. This time, it was high. I have to be worried I can't do anything till next week."

The shortstop did work out on Thursday. But other than the intrasquad game on Monday, he has not played.

Reyes said that he didn't feel any different than he has recently.

"I don't know what's going on, this is the first time I've ever had something like this," Reyes said. "I have to be worried. I can't do anything. ... I'm getting tired of it. My team is always playing without me. I want to play."

Carlos Beltran, on restricted duty as Reyes is, empathized with his younger teammate.

"He's a little frustrated, but he should be a little relieved," Beltran said. "It has nothing to do with his leg. ... Knowing him like I do, he cannot live without baseball. ... I just hope what he has right now is not an issue that will keep him out."

Reyes missed most of last season and had surgery on his right leg in October. He hasn't been restricted in any way by his leg this spring. He tripled in his first at-bat in the intrasquad game and had no trouble running.

Manager Jerry Manuel said he will have Ruben Tejada, a 20-year-old rookie, play with the big league infield when possible, but that others -- Alex Cora, Anderson Hernandez, Luis Hernandez and Russ Adams -- also are available. It is too early in this situation to draw conclusions. But Tejada seemingly has passed Anderson Hernandez on the shortstop depth chart. The club has come to have higher regard for Hernandez as a second baseman than as a shortstop.

Marty Noble is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.