EXCLUSIVE

Brett Favre finished 2nd again ... not to the Denver Broncos or New Orleans Saints ... but to his wife Deanna, who absolutely CRUSHED Favre in a Florida triathlon ... beating him by nearly TEN MINUTES.

Brett and Deanna competed in the Key West Sprint Triathlon in Key West, FL this past weekend and although Brett did okay for his second time out (#1 in his category on the bike) he was no match for the Mrs.

Brett turned in a time of 1:35:12 while Deanna popped by him with a final of 1:26:35 ... a pure punishing no matter how you slice it.

To be fair ... Deanna is an experienced triathlete and Favre is a noob but still ... it's easy to see who wears the tights in this family.