Umenyiora said he wasn't aware he was required to speak to the media Monday through Thursday during Super Bowl week.
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"I chose to hang out with my family," Umenyiora said during the Giants' last player availability before Sunday's game. "I didn't know it was a mandatory media session, simply because we had Media Day (on) Tuesday. I didn't know it was Media Day every day."
Umenyiora wasn't sure what questions he would have faced Wednesday that were much different from Tuesday's Media Day event at Lucas Oil Stadium.
"We hadn't practiced; we hadn't done anything," Umenyiora said. "I didn't really know there was anything that needed to be talked about between Tuesday and Wednesday. It was a mistake, a big mistake, but a mistake nonetheless."
The $20,000 fine didn't come as a surprise to Umenyiora.
"I understood it; I completely understood it," he said. "The NFL has to do what they have to do to protect the brand and get the product out to the people. I understood why they fined me that much, and it's OK."
"We weren't pleased with that, but Osi will participate and be there today," Coughlin said.