Scott Wedgewood made 23 saves in an unexpected start and Wyatt Johnston broke a scoreless tie with a second-period goal to lead the Dallas Stars over the St. Louis Blues 4-1 on Monday night.

Jason Robertson, Ty Dellandrea and Miro Heiskanen also scored for Dallas, which has earned at least one point in eight of its last nine games.

Brandon Saad scored for St. Louis, which has lost three of four.

Jamie Benn had two assists for the Stars, who lead the Central Division with 30 points.

Wedgewood was scheduled to serve as Jake Oettinger's backup, but moved into the starting role after Oettinger became ill right before the game.

Robertson extended his point streak to 16 games with a goal that made it 3-1 late in the third. Robertson has 17 goals and 12 assists during the run. He leads the NHL with 19 goals.

St. Louis C Robert Thomas missed the game with a lower-body injury sustained in the third period of Friday's 5-4 win over Florida. He is day-to-day. Thomas leads the team with 15 assists.

The Blues host the Carolina Hurricanes on Thursday.