Knoblauch's decision to consistently be scratching Gagner is puzzling considering the other options. The other two wingers currently occupying the fourth lines do have minor contributions on the penalty kill, but have been complete black holes offensively. Connor Brown is being outscored by actual goalies across the league, and Mattias Janmark's only goal bounced off his chest. Gagner has proven to be far more useful offensively and adequate defensively to take their place, and yet he's still scratched.
With the Oilers also reportedly looking for a fourth line forward to add in trade, it simply doesn't make sense that they're not playing their best fourth line forward, instead playing two players who have combined for one goal all season.