The Cubs came out thumping last night for their new manager knocking out 15 hits and taking 6 walks, 3 of them by Soto as they pitched around him in the 8th spot. The last time the Cubs had an interim manager it was 2002 and the job went to Bruce Kimm (with Rene Lachemann getting one game before Kimm took over). The Cubs responded well that first game for Kimm, winning 7-3 over the Braves, but he ended up going 33-45 on the year, nearly identical to Baylor who was 34-49 before being fired.
You have to go to 1991 for the next mid-season firing, when Don Zimmer got canned after going 18-19 and once again a one game gig was given to bridge the gap, but this time to Joe Altobelli before Jim Essian took over. If my math is right, the Cubs won that game as well for Essian, a 5-2 win over the Mets thanks to Greg Maddux, but Essian didn't fare much better than Zimmer did for the rest of the season finishing with a 59-63 record.
Some other interim manager results since 1970 for the Cubs.