The news comes at a good time for St. Louis, which has dropped three straight headed into Saturday’s game against the Penguins.Despite missing two months of the season, Perron is still fourth on the club in scoring with 35 points (17 goals). Perron, the Blues’ first-round pick in 2007, played his first six seasons in St. Louis before leaving for stints with the Oilers, Penguins and Ducks. He returned to St. Louis in 2016, but was left unprotected in the NHL Expansion Draft and was chosen by the Vegas Golden Knights.After scoring a career-high 66 points for Vegas to help the surprising Golden Knights to the Stanley Cup Final, Perron signed a four-year, $16 million deal to return to the Blues.In a corresponding move, the Blues assigned forward Jordan Kyrou to the team’s AHL affiliate in San Antonio. David Perron is back.The Blues announced Saturday they have activated the 30-year-old forward off injured reserve. Perron had missed the past 24 games with an upper-body injury.