The Frontier League is an independent baseball minor league with teams in the Midwest and Northeast. Two of their clubs are based in the Chicago area (Joliet and Schaumburg).
The league is going to experiment in 2022 with what they are calling “sudden-death baseball”:
The @FLProBaseball has announced it will use "sudden death baseball" to settle tie games. After one extra inning if game remains tied, the home team chooses to hit or pitch. The hitting team puts a runner on 1st. 3 outs. Run scores? Hitting team wins.