MAYFIELD — Dylan Lanza doesn't fit the mold of a typical donor in the Mayfield Central School District. The 26-year-old alumnus recently donated $2,500 earmarked for prom, post-prom and graduation expenses to this year's senior class. It's the latest among a number of donations Lanza has made as owner of Upstate Property Management NY. "People don't start doing that until their mortgages are paid off and their kids are in college," said MCSD Superintendent Christopher Harper. "You know what I mean? He's at the other part of his life." It's an unexpected turn of events for the former varsity baseball…