Former Yankees pitcher Mel Stottlemyre was improving Saturday and looking forward to leaving the hospital, according to a social media post by his son Todd.

A day earlier Todd Stottlemyre wrote on Facebook that Mel Stottlemyre, who has battled cancer since 1999, was “fighting for his life.”

But the elder Stottlemyre’s condition has since improved.

“Our family has been overwhelmed with Joy at the amount of love and prayers for my father and family,” Todd Stottlemyre wrote. “Please know that the greatest warrior I have ever known is doing a lot better. He is recovering at God speed and he is looking forward to getting out of the hospital. It’s just a matter of time before he is fishing again. Please share this post so that all the people who have been praying know that their prayers have been answered and that our family is forever grateful. We will continue to pray for the less fortunate during this holiday season. May God Bless You and Merry Christmas.”

The 75-year-old Stottlemyre, who pitched for the Yankees from 1964-74 before returning to the club as Joe Torre’s pitching coach for four World Series winning teams, has battled multiple myeloma — a cancer of the blood marrow — for the last 16 years.

A five-time All-Star, Stottlemyre went 164-139 with a 2.97 ERA in his 11 seasons with the Yankees. He served as Mets pitching coach for the club’s last World Series winning team in 1986 before returning to the Yankees in the same role following Torre’s hiring as manager in 1996. The Yankees won the World Series in 1996, ’98, ’99 and 2000 with Stottlemyre overseeing the pitching staff.

Stottlemyre resigned his position following the Yankees’ loss to the Angels in the 2005 ALDS, citing tension with owner George Steinbrenner. Among the factors that led to him leaving was Steinbrenner’s comment after the series that he had congratulated Angels manager Mike Scioscia on the victory.

“My first thought was, ‘What about [Torre]?’ ” Stottlemyre said. “Joe did a hell of a job, too. To congratulate the other manager and not congratulate your own, after what he’s done this year, I laughed.”

Stottlemyre served as Mariners pitching coach in 2008 and retired from baseball after the season.

The Yankees honored Stottlemyre with a plaque in Monument Park in 2015.

“The pinstripes, to me they mean everything,” he said at the ceremony. “It’s my ballclub. This is my second home. It’s been a thrill over the years to wear this uniform. I can honestly say every time I put this uniform on — even though we weren’t — I felt unbeatable.”