Pierre-Olivier Joseph, D:The 23-year-old, chosen by the Arizona Coyotes in the first round (No. 23) of the 2017 NHL Draft, has five points (one goal, four assists) in 20 games for the Penguins. Joseph could stick at the NHL level this season, partially tasked with replacing the lost production of Matheson. … Kasper Bjorkqvist, F: The 25-year-old, selected in the second round (No. 61) of the 2016 NHL Draft, made his NHL debut last season, scoring one goal in six games, and had 12 points (eight goals, four assists) in 54 games for Wilkes-Barre/Scranton of the American Hockey League during his first full professional season. … Valtteri Puustinen, F: The 23-year-old, a seventh-round pick (No. 203) in the 2019 NHL Draft, had an assist in his NHL debut against the Vegas Golden Knights on March 11. He had 42 points (20 goals, 22 assists) in 73 AHL games last season.