Washington Nationals starting pitcher Doug Fister delivers during the first inning of a baseball game against the San Francisco Giants on Friday, Aug. 22, 2014, in Washington. (AP Photo/Evan Vucci)

When the media covering the Washington Nationals asked Doug Fister about the mysterious stitches on his neck Friday night, the answer they got was a stunning one: he’d had skin cancer removed from his neck a few days earlier.

“He’s known about this for some time, and doctors took care of it,” manager Matt Williams said. “It’s a fairly common occurrence. Because it’s on his neck and he’s on television, people notice. From all indications, everything was taken care of. He’ll certainly have further tests, make sure everything is good.”

Williams said Saturday he never considered holding Fister out of his Friday start.

“The doctors said there were no issues. They went in and did what they had to do,” he said. “He could certainly pitch with it, it didn’t bother him. Going out there, he didn’t feel it or notice it or anything within that start.”

Williams said skin cancer in baseball is “a big issue,” because “you’re forced to be in the sun alot.”

“We put (sunscreen) on every day when we’re out there in the daylight hours, making sure we’re as protected as possible,” Williams said. “It’s important. In the clubhouse, there’s all kinds of (sunscreen), it’s everywhere. And the majority of the guys use it on an every day basis.”