Jonathan P. Martin, 54, died Tuesday in Baystate Medical Center.  He was born in Holyoke the son of Roberta (Podbelski) Martin and the late Dr. Paul T. Martin.  Jon was the husband of Dianna (Moll) Martin and father of Benjamin Martin.  He worked for Sun-Gro Horticulture in Agawam and previously for City of Springfield's Retirement Board.  A 1989 graduate of St. Mary's High School and Jon attended Dean College.  He loved music, going to concerts, the "Pops" at Tanglewood and playing video games with Ben.  Jon is also survived by his brothers Gregory, Patrick and David Martin, David's wife Megan and many dear friends. Besides his father, Jon was predeceased by a daughter Janelle, sister Paula Martin, sister-in-law Jane Martin and nephew Paul Martin.  The funeral will be held at the West Springfield Curran-Jones Funeral Home Wednesday at 11:00am with private burial in St. Thomas Cemetery.  Visiting hours will be held prior to the funeral home service on Wednesday from 9:30 - 11:00am.  For online condolences please visit curranjones.com. Memorial contributions may be made to Ben Martin's Scholarship Fund, c/o Bank of America, 225 Memorial Ave. West Springfield, MA 01089.