This looks very familiar in my yard. Go here for more info: lettuce

"I'm surprised I haven't come across wild lettuce as an alternative to toxic pain, migraine and anxiety pills, but a recent report by Ask a Prepper tipped me off to it and now I want to tell everyone! Out of everyone I know, pain is their biggest complaint! While people tell us that we shouldn't focus on pain, but what's causing the pain – everyone with serious pain knows that you can't move forward or think straight until you can get some relief."

Here's another article on the same subject: practicalselfreliance.com/wild-lettuce-pain-relief/