Denial

I know this is a silly questions but I’m going to try anyway. My son had his heart set on UMD. He was denied. We knew it was a long shot. 1240 SAT 3.65 gpa. Tons of extra currics and leadership, volunteer etc. is there a way to appeal the decision? He had an excellent first two marking periods. Can we send midyear grades in and write a letter “begging” to have his application revisited? Or is a no…a final no? Pulling at straws here!!!