Was there a freeze?

I'm thinking it might be this.

Virtually every peach orchard in the state has some Cytospora canker present

http://hnr.k-state.edu/extension/info-center/common-pest-problems/common-pest-problem-new/peach-perennial.pdf

Penn State web pages about what seems to be the same condition show the same canker shape as in your photos.

Those look like injured bark.....branches against branches rubbing in the wind.

Possibly hail but hail usually is less uniform in shape. cicada make scars on limbs but usually several egg laying sites next to each other.

Thank you all for taking a look and giving me your input. I am still stumped.

I had checked pictures of cicada damage, but like fruitnut says, the damage they cause when laying eggs generally shows up as lines of scars clustered together, and they have a very rough appearance. The shape and size of the scars are so uniform, I don't think it can be hail damage either. Konrad; The branches were not rubbing against each other or anything else. Embothrium; I don't know about the Cytospora canker... What I see does not fit the symptoms described in your linked article. The trees are young and healthy as well. Fireball; We have had a lot of freezes. We get below 32 off and on all winter. Typically our last freeze occurs by April 15.

Look at photos and descriptions of Cytospora on stone fruits on other web sites.

Embothrium,

Most of us who have grown peaches for a while, have an idea what canker wound on peach looks like. Most of the time, the first answer of a peach problem is "canker".

However, from the two pictures above, they don't look like any peach canker I know.