Mike Johnston, who coached the Penguins from 2014-16, said Maatta handled everything, including the cancer diagnosis, with a level head.
"It was a situation where any person having to handle news like that it'd be difficult, challenging. But I thought he had great composure, had a really good focus and attitude," said Johnston, now vice president, general manager and coach of Portland of the Western Hockey League. "It was like, 'Hey I'm going to come out of this, going to move forward.' He is that type of person. He's a great kid."
Maatta played 10 regular-season games before having the right side of his thyroid removed on Nov. 4, 2014. He started skating again on Nov. 11 and played 20:14 when the Penguins defeated the Montreal Canadiens 4-0 on Nov. 18, 2014.
According to the National Cancer Institute, thyroid cancer, the eighth-most common cancer in the United States, is, "typically slow growing, highly treatable and usually curable." The five-year relative survival rate for localized thyroid cancer (hasn't spread outside of the thyroid) is 98 percent.
Maatta, who still takes a daily thyroid hormone, credited the Penguins medical staff for helping him through it all.
"Obviously, the doctors in Pittsburgh, the training staff there did an awesome job," he said. "They helped me out so much, they found the best people to treat it. Anything I wanted to ask, I wanted to know, they talked to me. If they didn't know, they found the people who would know better. That's something you really respect."