After 38 years as a selectman, Joe Freitas is calling it quits. The 80-year-old former fence company owner, who is now retired, said it’s been a good run, but he will not be on the ballot at Plympton’s annual town election in May. “The mind is still ready, but the body says it’s been enough,” Freitas, the current chairman of the Board of Selectmen, said in a phone interview after making the announcement to his fellow selectmen. “I’m not going to disappear. I’ll serve the town in some capacity if they need me.” The Plymouth native, who has lived in Plympton for nearly 60 years, also served on the Finance Committee and the local and regional school committees. So far, one resident has taken out – and returned – nomination papers to fill the three-year seat on the board of selectmen: Main Street resident Colleen Thompson. Nomination papers signed by at least 20 registered voters must be returned to the town clerk’s office by March 31.