The Miami Dolphins had their preseason opener in Chicago on Sunday, and it ended in a 24-24 tie . The big test for the Dolphins was how the backups would fare , especially on the offensive line and at cornerback. The results were mixed.

Another big test was whether the backup edge rushers, who have been dominant in training camp, could continue playing at that level. They were good.

Here’s what we learned Sunday:

Gay makes a play, which is no surprise

Inside linebacker Willie Gay Jr., had a half-sack on the opening series, along with defensive tackle Benito Jones, living up to his training camp hype and boosting the bright outlook for the defensive front seven.

Gay (three tackles), in his first year with the Dolphins, has been one of the best playmakers, in the run and pass game,

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