When did Dave Pelzer get married and who the first time?

He has been married twice: 1- Phyllis Pelzer (referred to as Patsy in the books).

Married in 1986 and Divorced in 1994. 2-Marsha Pelzer (same name as in the books)

Met her in 1995. Lived together. Married her in 1999. Divorced her in 2005