They're calling the promotion "Fourth Quarter Franks."
If a Bulls opponent misses 2 consecutive free throws in the fourth quarter... your game ticket is good for a free Chicago-style hot dog.
You'll have 48 hours to redeem the ticket at Portillo's restaurants in Illinois and Merrillville, Indiana.
The promotion begins Friday.
This is replacing a longtime deal the Bulls had with McDonald's, where fans could get a free Big Mac if the Bulls scored more than 100 points during a win at The United Center.
McDonald's decided in the off-season to scale back its relationship with the Bulls, which included ending the 100-point promotion, Bulls spokeswoman Sarah Moran said in an email.