At Eureka Quarry Field, in Warrington, where O'Connor spent several nights a week playing in the SBA Americas Softball League, loved ones reflected on his life and the impact he had on those around him.
"We're all one big family here. It means a lot to have a lot of support behind me," said his widow, Lucy Troutman. "I'm still in shock myself, but I'm just trying to do right by him and what Sean would have wanted," she said.
According to his family, O'Connor had planned to attend a family cookout after paddleboarding but never arrived. He was reported missing shortly after 8 p.m. while on the water with a coworker as storms moved through the area.
"I know it's gonna take time. It was nobody's fault. It was just that storm hit fast and rough, and where they found him, there's like no shot in that lake where he was found," said Sean's father, Paul O'Connor.
Paul O'Connor said his son's body was recovered after midnight.
"I completely lost it," Paul O'Connor said. "He was my right-hand guy. Everywhere we went, I went, he came, all the way up to when he was married."
An Upper Moreland High School and Penn State Abington graduate, O'Connor built a career helping people in recovery and battling addiction. His family said that work reflected the person he was.
"He loved doing it, helping people. He loved doing that since he was a kid," his father said.
"I want people to remember how much out of his way he went to go help people," Troutman said.
"Sean was definitely a loving, caring man and would do anything for anyone," added Stephanie Thrasher, an SBA Americas Softball League coach.
O'Connor was heavily involved in the softball league and was scheduled to play in a tournament the day after his death. Teammates found a way to honor him during the event.
"I don't care if we go 1,2,3 and he's the third out. I said I need him to be in this lineup, so he went in the lineup. I took an out for him and we went undefeated 4-0 and won the whole championship," said Thrasher.
After the tournament, O'Connor's father took a photo with both teams.
Thrasher also organized a GoFundMe to help cover funeral costs. The fundraiser was quickly approaching its goal Wednesday night, helping ease the financial burden on O'Connor's family as they deal with the sudden loss.
"Tell your loved ones you love them because you never know when it's gonna be the end," Troutman said.
Funeral arrangements have not been finalized. The coroner's office has not released an official cause of death, although O'Connor's father said he was found deceased underwater.