The Colorado Avalanche revamped their roster during the season, but all that work might go to waste if they can’t rebound Saturday night.Colorado beat the Dallas Stars in Game 1 of their Western Conference quarterfinal series, but two straight overtime losses have Dallas in control of the matchup. It makes Game 4 in Denver close to a must-win for the Avalanche.”We knew it wasn’t going to be easy,” Colorado coach Jared Bednar said. “We’re playing one of the top teams in the league. … It’s a slugfest. So we went in there and won Game 1, they won Game 2. Now they came in here, won game one (in Denver). Now it’s up to us to go win game two. It’s a seven-game series for a reason.”The Stars have won the last two despite not having two of their best players. Forward Jason Robertson, the team’s leading goal-scorer in the regular season, suffered a knee injury in the last game of the regular season and defenseman Miro Heiskanen has been out since late January.Dallas has grabbed a 2-1 series lead with a strong defense and timely scoring. It is also getting production from Thomas Harley, Heiskanen’s defensive partner who leads the team with three points (two goals, one assist) against the Avalanche.Harley had just four assists in 19 games during last year’s run to the conference finals and could match that point total in Game 4.”I don’t know if I had something to prove,” he said. “I am aware of my role on this team and what I need to do to be successful and for this team to win games. So there is pressure on myself to perform.”The Stars have frustrated Colorado, especially on the power play. The Avalanche didn’t score in six chances in Game 3, which included a four-minute power play that spanned the end of the third period and the start of overtime.Colorado has two power-play goals in 13 chances.