So here's the deal, I've been decorating cakes off and on for a couple years now, nothing fancy, just the occasional birthday cake for my husband, son, and a couple friends. Maybe a total of 6 cakes. My dilemma is that, this time as I was trasfering the cake to the board, it split if about 5 different places, I still have it in the basic 9x13 shape, but I'm worried it won't frost correctly. (using buttercream) I can't believe this is the 1st time its happened, figured it would have happened sooner. Any tips for spreading the the frosting, without getting crumbs everywhere.

You can pipe the frosting throughout and then smooth.

Welcome to CC. You need to do a crumb coat. Maybe a bit thicker than usual, because of the cracks. Put buttercream on your cake, don't worry about making it pretty. Then, go over it and take some off, leaving a thin coat of buttercream. Chill and then frost. Hope this helps!