Jenrry Mejia faced batters Monday for the first time since undergoing Tommy John surgery on May 16, 2011.

Mejia is due to again face hitters Saturday, then next Thursday.

Meanwhile, D.J. Carrasco (ankle) has resumed throwing off a mound, while fellow DL'd pitcher Pedro Beato (shoulder) is only progressing "slowly."

Chris Young, who had surgery to repair a torn anterior capsule in his right shoulder the same day as Mejia underwent the Tommy John surgery, has not yet started facing hitters.

Some Mets guys have not been assigned to any particular roster.

In Erik Goeddel’s case, he has a groin strain. I labeled him as one of the two Mets with the most to prove in St. Lucie in 2011, starting with the fact that he needed to prove he can stay healthy. The good news here is that for a guy who’s had Tommy John surgery in college, and elbow and shoulder soreness as a professional that have kept him off the field in the last two years, it’s a leg thing this time.

Kyle Allen appears healthy. He’s throwing bullpens and traveling with St. Lucie, but is not on the active roster. I did not rank Allen in my Top 41 this year for the first time since 2009, as he’s stalled at advanced-A. In 2010 and 2011 in 207.1 IP with St. Lucie in 47 games and 39 starts he’s given up 237 hits, fanned 5.5 guys per nine and walked 4.9 per nine. I had him ranked highest at #13 in the system in 2010, #29 a year ago and #33 back in 2009. At this point, it seems the Mets are just more interested in giving innings in St. Lucie to other guys who have spent less, (or no) time in advanced-A.

Darrell Ceciliani has not played since Monday night when he strained his hamstring celebrating his game-winning homer. He strained the same hammy in April 2011 with the Gnats and missed almost four weeks. No word yet on the severity of this one.

Cesar Puello has not played since last Friday after fouling a ball off the top of his foot. He’s expected back in the lineup any day now.

Darrell Ceciliani has not played since Monday night when he strained his hamstring celebrating his game-winning homer. He strained the same hammy in April 2011 with the Gnats and missed almost four weeks. No word yet on the severity of this one.

Lynn Worthy ‏ @PSBLynn

#BMets 3B Jefry Marte left today's game in Portland with "tightness" in his hamstring. It was a precaution, according to Pedro Lopez.

#BMets first baseman Allan Dykstra appears to have a fractured wrist, but X-rays will be reviewed by doctors in NYC.

I assume "fractured wrist" probably has a lot longer recovery time than "fractured pinky."

Sad to hear.

Jenrry Mejia was slated for a longer appearance when he faced extended spring training batters Friday in Port St. Lucie, Fla. But Mets staff pulled Mejia just into the right-hander's second inning of work because they sensed he was too excited and overthrowing and "coming out of his delivery," pitching coach Dan Warthen said.

With Mejia in the final stages of returning from May 16, 2011 Tommy John surgery, Mets officials are being vigilant in ensuring Mejia does not alter his delivery or try to overexert himself.

Also in St. Lucie:

• D.J. Carrasco could begin a rehab assignment for his twisted right ankle with Class A St. Lucie within days.

• Chris Young, who had surgery to repair a torn anterior capsule in his right shoulder the same day as Mejia's Tommy John procedure, could be in a Florida State League game within two weeks, Warthen said. The pitching coach said Young "feels great" after facing batters, but the Mets are proceeding slowly given the gravity of his surgery.

• Young is expected to eventually work his way up the Mets minor league system, from St. Lucie to Triple-A Buffalo. He has contract outs on June 1 and July 1 if he is not promoted to the majors by those dates.

• Pedro Beato, who like Carrasco opened the season on the DL, is progressing and "building up arm strength," according to Warthen.