Georgia Tech let athletic director Todd Stansbury and coach Geoff Collins go on Monday, two days after a 27-10 loss to UCF that dropped the Yellow Jackets to 1-3 on the season.
Collins was in his fourth season as coach, and the loss to the Knights last week was the Yellow Jackets' ninth straight to FBS opponents dating to last season.
But interim coach Brent Key rallied the troops as the Yellow Jackets (2-3, 1-1 ACC) authored their best performance of the season. Though they amassed only 17 first downs and 334 total yards, they possessed the ball for 31:04 in the rain in Pittsburgh and churned out a victory as 21.5-point underdogs.
"I've known these guys have had it in them all along, and we just needed to get them on the same page," Key said in his postgame, on-field interview on the ACC Network.
Pitt (3-2, 0-1) struggled to find its footing on the wet turf, finishing with just 106 yards on the ground. It was Pitt's second home loss of the year, after dropping a 34-27 overtime decision to Tennessee last month.
Georgia Tech amassed 232 yards on the ground and capped off the victory with Sims' 18-yard touchdown run with 1:25 left in the fourth quarter. Hassan Hall piled up 157 yards on the ground for the Yellow Jackets.
"The coaches rallied them together, kept them focused on the mission, one day at a time, one play at a time to get this win," Key said.
In a stunning turn of events -- though it's still quite early in the season -- the Yellow Jackets find themselves just a half-game behind Duke and North Carolina for first place in the ACC Coastal Division. They will host the Blue Devils on Saturday in Atlanta.
"I'm just so happy for the kids, the coaches, the alumni base," Key said. "We have a lot of work to do now. ... We've got Duke in seven days."
Key is the first Yellow Jackets alum to lead the program since Bill Curry's tenure in the 1980s.
The Associated Press contributed to this report.