[2] In 1942, after the outbreak of World War II, Weldon left New York to serve in the United States Navy Chaplain Corps.
[2] Serving as executive director of Catholic Charities from 1947 to 1950, he was raised to the rank of a papal chamberlain in 1947 and a domestic prelate in 1948.
[3] He received his episcopal consecration on March 24, 1950, from Cardinal Spellman, with Archbishop Richard Cushing and Bishop Stephen Joseph Donahue serving as co-consecrators.
[5] In September 2018, a diocesan Review Board notified Bishop Mitchell T. Rozanski that it had found an allegation of sexual abuse by Weldon credible.
[6][7] In June 2020, an investigation by retired Superior Court Judge Peter A. Velis found the victim's claim "to be unequivocally credible.
"[8] After Velis' findings were released, Rozanski asked Trinity Health of New England to remove Weldon's name from its rehabilitation center, the former Farren Memorial Hospital in Montague.