According to Baltimore County police, no note was found but an investigation showed that Flanagan, 59, who was found dead on Wednesday, had been upset about financial issues.
The police said in a statement that Alex Flanagan had last spoken to her husband at about 1 a.m. on Wednesday.
"She told police he sounded upset and promised he would talk to her the next day," the statement read. "When she did not hear from him, she called a neighbor to check on him."
When the neighbor could not locate Flanagan she called police, who eventually located the former major leaguer about 250 feet behind his home.
He also served as the Orioles pitching coach, executive vice president of baseball operations and was in his second season as color analyst on the Orioles television broadcasts.
Flanagan, a left-hander who ended his playing career with a 3.90 ERA, also pitched three seasons for the Toronto Blue Jays.
The Flanagan family issued a statement on Thursday which read: "We thank you for your support and kind words at this difficult time. Thank you for respecting our privacy as we grieve. A private memorial will be held at a later date."
(Writing by Mark Lamport-Stokes in Los Angeles; Editing by Frank Pingue)