If we made a shirt with the face of an athelete (After he said we could) can his Agent come after us for money??

Unfortunately, you are dealing with a property right in that Schmitt's face is likely covered by the right of publicity. Though I do no practice in WA, there is likely some form of that right there. And that right essentially allows one to control (and profit from) commercial uses of their image. Although you got the verbal ok from him, to make this a real profit enterprise you would really need some kind of license/release from him as a foundation. Also, the agent should be told of Schmtt's oral OK and a release agreement should be drawn up. However, if the agent is just being greedy, without Schmitt to vouch for the arrangement, you are on shaky ground.

I hope this helps.

Disclaimer: This answer is for informational purposes only and does not constitute general or specific legal advice, nor create an attorney client relationship.