There may not be anything wrong with Steven Matz after all.

The New York Mets starting rotation has been without the 25-year-old left-hander since April 2 because of issues involving his throwing elbow, but it appears the team's doctors are unsure of what the trouble actually is.

On April 3, Matz told reporters, including Matt Ehalt of The Record, he's dealing with a flexor tendon strain, but the team's doctors apparently haven't found anything of the sort.

"Our (doctors) found nothing wrong," a person with knowledge of Matz's health told Bob Klapisch of The Record.

A March 30 MRI on Matz's elbow came back negative, and he was subsequently transferred to the 10-day disabled list with what the club described as left elbow inflammation.

The Mets have become frustrated by the situation, according to Klapisch, and are now privately asking who actually diagnosed Matz.

They believe he was given the news by a third-party doctor, which is his right, writes Klapisch.

Matz, who underwent Tommy John surgery in 2010, has only made 28 starts in the bigs since being selected in the second round of the 2009 draft.

During those appearances, he's impressed with a 3.16 ERA and 1.21 WHIP, although he's only been able to amass 168 innings of work in the majors.