The 31-year-old, who makes his return to Philadelphia on Wednesday night, opened up about his departure from the club after nearly eight seasons.
"I put so much time and sweat and tears into this organization," Simmonds said, according to The Philadelphia Inquirer's Sam Carchidi. "I thought I did everything I could possibly do to at least get a bit of an extension."
Following a career-best 32-goal, 60-point season in 2015-16, the 6-foot-2 winger saw his point total decline in each of the past three campaigns. With Simmonds on an expiring contract in 2018-19, the Flyers traded him to the Nashville Predators at last season's deadline instead of offering him a new deal.
The Toronto native became an unrestricted free agent this past summer and signed a one-year, $5-million pact with the Devils on July 1.
Simmonds recorded 203 goals and 378 points over 584 career games with the Flyers.