through 35 games before sustaining a broken jaw during a game against the New Jersey Devils in late December. As such, he was expected to miss four to six weeks in order to recover. He was activated off injured reserve on January 24, 2017, after missing 10 games and became the Penguins top defenceman following an injury to Kris Letang. He finished the regular season with one goal and 14 assists for 15 points through 70 games. His sole regular season goal came on April 4, 2017, after going 151 regular-season games without scoring, against the Columbus Blue Jackets in a 4–1 win. As the Penguins once again qualified for the Stanley Cup playoffs, Dumoulin helped the team win their second Stanley Cup on June 11, 2017. It was later revealed that Dumoulin had been playing through a hand injury that occurred after taking a slapshot off the hand in Game 5 of the Eastern Conference quarterfinals. On July 24, 2017, the Penguins re-signed Dumoulin to a six-year, $24.6 million contract worth $4.1 million annually. The deal began during the 2017–18 season and runs through the 2022–23 season. In the first year of his new contract, Dumoulin set career highs in goals, with five, and points, with 18, through 80 games. He had missed only two games during the season following a concussion. Following his return, Dumoulin also completed his bachelor's degree in marketing from BC. As the Penguins once again qualified for the Stanley Cup playoffs, they met with the Philadelphia Flyers in Round 1. Throughout the series, Dumolin continued to produce and recorded multiple points in the first two games. During Game 3, Dumoulin and Evgeni Malkin tied a post-season record for the fastest two goals scored by one team. His goal came five seconds after Malkin's one-timer from the right circle on a 4-on-3 power play. The Penguins eventually beat the Flyers in Game 6 to tie their franchise record with nine playoff series wins. Dumoulin returned to the lineup for Round 2 against the Washington Capitals but went through the NHL's concussion protocol following a hit in Game 2. The Penguins would end up falling to the Capitals in six games. Dumoulin re-joined the Penguins for the 2018–19 pre-season but suffered an upper body injury during a game against the Columbus Blue Jackets. He missed a week before returning in a full-contact jersey at Penguins practice