Khudobin remains undefeated in regulation this season (5-0-2) and has won his last two starts, grabbing wins over Los Angeles and San Jose during Boston's West Coast swing last week. The 31-year-old also started three consecutive games in October (2-0-1) when Tuukka Rask was sidelined with a concussion.
Cassidy acknowledged that while Rask is not pleased with the current situation, he understands it.
"I've talked to Tuukka about it, he's not happy, but he gets it," said Cassidy. "We're creating competition, while we're getting good goaltending out of Anton. Hopefully it makes Tuukka a better goaltender down the road and makes our team better, certainly, when you're backup is giving you quality starts."
Rask last started in Anaheim a week ago, allowing four goals in a 4-2 setback against the Ducks.
"We've said it and I'm not gonna hide behind it," said Cassidy, "a lot of what's happened with Tuukka's starts is we need one more save or we need to score one more goal. It's one or the other. If we're not gonna score then hopefully you get that one more save.
"Been a little bit of the difference with Anton. It's a 2-1 game [against San Jose] and he keeps it out of the net. We do get the third goal, so we get both in that particular instance. Sometimes that's what you need and it's been what's missing a little bit in Tuukka's game."
