This idea is just waiting to happen. I believe about two percent of churches could go through a process of discernment and take on a special ministry - to call only newly-graduated seminarians for their very first pulpit, for a period of no longer than five years, and to ensure that minister has a positive experience.
The Lilly Foundation funds a similar program, but seminarians are placed in large congregations, in a multi-staff environment. Smaller churches with only a sole pastor could play this role equally well. The ideal church is likely to be 125-175 at Sunday worship, not riven by conflict, generally healthy, but looking for a new and engaging role or purpose.