(Lenny Ignelzi/AP)

Another elbow, another problem. Miami Marlins pitcher Jose Fernandez is the latest star who may need season-ending elbow surgery, National League sources told ESPN.

Fernandez, who was put on a the 15-day disabled list with a sprained elbow on Monday, leads the majors with 70 strikeouts and has a fastball that averages 94.6 mph. However, on Friday, the 21-year-old gave up six runs in five innings, and his fastball velocity was down 2 mph. ESPN’s Buster Olney explained on SportsCenter Tuesday:

“It was after that game that he went to Marlins trainers and told them that he had discomfort in his elbow. … This is a loss not only for the Marlins but all of baseball.”

Fernandez is now the 18th MLB player in 2014 who has been diagnosed with torn elbow ligaments, which may require Tommy John surgery, which some say may be related to youth baseball programs. According to MLB Reports, the 17 others who have had the surgery include:

  • A.J. Griffin, Athletics
  • Pedro Figueroa, Rangers
  • Ivan Nova, Yankees
  • Josh Johnson, Padres
  • Matt Moore, Rays
  • Jameson Taillon, Pirates
  • Bobby Parnell, Mets
  • Cory Gearrin, Braves
  • David Hernandez, Diamondbacks
  • Bruce Rondon, Tigers
  • Patrick Corbin, Diamondbacks
  • Jarrod Parker, Athletics
  • Brandon Beachy, Braves 
  • Kris Medlen, Braves
  • Luke Hochevar, Royals
  • Miguel Sano, Twins
  • Cory Luebke, Padres

The surgery is serious and can take 12 to 18 months for a full recovery.

As for the Fernandez’s next steps, he’ll return to Miami for further evaluation, while Marlins coaches wait for the results of an MRI exam taken on Monday in Los Angeles, ESPN reports.