Has this been discussed?

I was not able to read all the posts after the game. Sorry if this has been discussed. We killed a punt on the UTEP 1 yard line. For the first time this year to my knowledge, we put in the entire 2nd team defense. We had them in a position for a possible safety, or at worst stopping them deep and getting good field position. We yielded 30 yards and then put the entire first team back on the field. Subsequently UTEP score on a 99 yard drive. Was there a particular reason for the switch? It may have been thought to be a good time to rest the first team. Or maybe a message was being sent. (If so it apparently was not heard.) But it just seemed very curious to me. I do believe it was entirely 11 swapped for 11 with perhaps teh exception of Bennie Thomas who had to play both 1st and 2nd due to the injury to Moore.