In his 30th game since returning from a concussion that sidelined him for more than a year, David Perron appears to be hitting his stride. Considering it was Andy McDonald's first game since he sustained a concussion in early October, he felt pretty good, too. Perron scored for the sixth time in four games and McDonald's speed was an immediate factor as he emerged from a 51-game absence in the St. Louis Blues' 3-0 victory over the San Jose Sharks on Sunday night.