Do you mean that you laid sod 3 years ago, or every year for the past 3 years?

What kind of sod was it? Fescue or Kentucky bluegrass?

Since you did not winterize, I'm thinking this is the price you're paying - late greenup. But if you have a lot of KBG in there, it could be the shade from the trees is finally getting to it and thinning it out.

I laid the back yard 3 years ago (almost no shade)
The front yard last year (almost no shade)
Its a tall fescue sod

My guess is the kbg in your tall fescue sod has not started growing yet give it some time.

That's just dormant grass Rick.. it will wake up, give it a few weeks, this has been a really cold spring so everything is taking it's time. Forsythia was almost 3 weeks behind in blooming this year