The Pittsburgh Penguins activated Sidney Crosby, Brian Dumoulin, Marcus Pettersson and Chad Ruhwedel from the COVID-19 protocol list ahead of Sunday night's game against the Washington Capitals.Coach Mike Sullivan, who also rejoined the Penguins on Sunday after exiting COVID-19 protocol, said all four of those players would be available."These guys all obviously feel strong enough and healthy enough that they're comfortable playing," Sullivan said. "We're excited to get them back in the lineup."Drew O'Connor, P.O Joseph, Juuso Riikola and Louis Domingue were re-assigned to Wilkes-Barre/Scranton.