Darling, 29, who was traded to the Hurricanes from the Chicago Blackhawks on April 28, 2017, and agreed to terms on a four-year contract May 6, 2017, split time with Cam Ward last season. Ward, an unrestricted free agent, agreed to a one-year contract with the Blackhawks on July 1.
In addition to Mrazek, the Hurricanes acquired defenseman Dougie Hamilton, forward Micheal Ferland and defenseman prospect Adam Fox on June 23 in a trade from the Calgary Flames for defenseman Noah Hanifin and forward Elias Lindholm. They also signed defenseman Calvin de Haan to a four-year contract.
The Hurricanes were 36-35-11 last season, 14 points behind the New Jersey Devils for the second wild card into the Stanley Cup Playoffs from the Eastern Conference. They have not qualified for the playoffs in nine seasons.
"Obviously, we didn't have success last year with the group we had, so it's nice to change it up," Darling said. "That's exciting. And then to get that second overall draft pick (forward Andrei Svechnikov) was huge too."
Carolina also will have a new coach. Rod Brind'Amour was hired May 8 to replace Bill Peters, who resigned April 20 and was hired as Flames coach three days later. Brind'Amour, who was an assistant with the Hurricanes the past seven seasons, was their captain when they won the Stanley Cup in 2006.
"He played the game," Darling said. "He had such a great career and he knows hockey so well. It's going to be nice to have his opinions come to the top in what he thinks we should do. He was great as an assistant coach, and I'm excited to see how he does as a head coach."