September handle grew 138% year-on-year and far surpassed the $365m of wagers placed in August.
Despite the enormous handle, revenue only reached $6.3m. PlayPennsylvania cites heavy promotions and unlucky results for the low win.
Online wagering made up approximately 90% ($414m) of the September handle, led by FanDuel Sportsbook at Valley Forge Casino with $168m in online bets. The DraftKings Sportsbook at Meadows was next closest with an online handle of $117m.
Dustin Gouker, lead analyst for PlayPennsylvania, said: “With the beginning of the NFL season, a full schedule of baseball, and the NBA and NHL playoffs, there may never be such a confluence of sporting events again. Like New Jersey, Pennsylvania has created a well-rounded market that can drive significant action on every major sport. That market dynamic was able to bear fruit in September in a way that may never be fully possible again.”