Familia underwent surgery Friday in St. Louis that was performed by Dr. Robert Thompson, and Alderson is uncertain whether Familia will be able to return to the team this year. His surgery was not for Thoracic Outlet Syndrome, according to Alderson, and the pitcher has been placed on the 10-day disabled list.
"We do believe this is something that is going to keep him out several months and it's possible he'll be back by the end of the year; it's possible he won't," Alderson said before the Mets faced the Brewers. "We just don't know at this point."
Familia first mentioned to the team's trainers Wednesday that he had some tingling in his right ring finger, and was examined during the game. The closer blew his first save of the season that afternoon, allowing four runs in the 6-5 loss to the Giants.
"He was cleared to pitch. It was a minor vascular symptom they wanted to follow up on as a precaution as they did the following day," Alderson said of how the team handled Familia. "That ring finger, I believe Jeurys said he didn't use that finger when he pitches. He wasn't worried about it from a pitching standpoint so he was cleared to pitch."
Familia then underwent tests Thursday at the Hospital for Special Surgery in Manhattan, and was diagnosed with a blood clot. The 27-year-old flew to St. Louis on Thursday night, and underwent the surgery on Friday after meeting with Thompson.
Alderson did not have details of the type of surgery Familia underwent.
With Familia sidelined, the Mets will use Addison Reed as their closer. Alderson said the team will evaluate internal options before external avenues. The trade market figures not to be ripe just yet since the season is not yet at the quarter mile.
The Mets may carry an extra reliever.
"As far as external possibilities are considered, there are always possibilities," Alderson said prior to this three-game series. "We are going to take a look at two or three people internally over the weekend and next week and decide from there."
Losing Familia puts an even bigger burden on an already taxed bullpen that has thrown the seventh-most innings in the majors this year.