Philbin said on Sunday that the decision between Ryan Tannehill and Matt Moore is still up in the air and "could be" made this week.
"We may have a decision soon, or we may play it out another week. That's still up in the air. We certainly haven't come to any decision on that right now."
All the Dolphins quarterbacks struggled to a certain degree in the 23-17 loss against the Carolina Panthers.
Tannehill went 11-of-23 for 100 yards and Moore went 5-of-15 for 57 yards. Tannehill did have one scoring drives, but his other five drives ended in punts. Moore took one drive from the Miami 11 to the Carolina 34 but only mustered a 52-yard field goal at the end of it.
Philbin didn't mince his words when it came to his quarterbacks' performances.
"Do we have to be better? Yeah. Were there some accuracy issues? Sure. Was there a time or two our quarterbacks could have stepped up to avoid pressure? Absolutely.
"They did do some good things. They had almost five drops, which impacted our ability to move the football. They didn't run a lot of bad plays, we didn't throw the ball into double coverage an awful lot. But their game management was relatively good."
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