What a day for the White Sox rebuild.

It started with the crowd going wild for Dylan Cease, the No. 18 prospect in baseball who strolled out to the mound for his major league debut and left it with his first big league win. It ended with the crowd going wild for Jose Abreu, the veteran leader in the White Sox clubhouse who blasted a three-run walk-off homer to complete a doubleheader sweep on the South Side.

In between, that same crowd saw a pair of Yoan Moncada home runs. It saw Lucas Giolito and James McCann coaching up Cease in the dugout. It saw the White Sox, losers of a combined 195 games during the 2017 and 2018 campaigns, grab a pair of victories.

It saw the future coming together.

The White Sox faithful have been asked to exercise an awful lot of patience during Rick Hahn’s ongoing rebuilding project. Well, that patience is starting to pay off, and it’s becoming very clear to those involved what is being built on the South Side.

“Something very big,” Abreu said after the game through team interpreter Billy Russo, “and I don’t want to leave here.”

Abreu’s status has been one of the pending mysteries of a season brimming with positives, and he’s been one of those bright spots, heading to his third All-Star Game next week in Cleveland. The walk-off homer in the bottom of the 12th inning Wednesday night was his 20th dinger of the season. He’s driven in 63 runs. He’s on pace to set new career highs in both of those categories.