In a weeklong series, The Post is looking at alternate realities in New York sports. Today’s edition looked at what would have happened had the Knicks drafted Steph Curry in 2009. Here are some other big Knicks what-ifs from the past 30 years:

1. What if the Knicks drafted Donovan Mitchell at No. 8 instead of Frank Ntilikina in 2017?

The worst part is Phil Jackson took the Frenchman specifically as a perfect fit to orchestrate/embrace his triangle offense — and Jackson was fired days later. While Ntilikina’s career has not gained traction, Mitchell — the Louisville gunslinger from Westchester — has been a ball of fire with the Jazz, making the 2020 All-Star Game. New Knicks hire Walter Perrin, Utah’s college scouting director, lobbied for Mitchell as Utah traded up to No. 13 to take him.

2. What if the Knicks didn’t trade Patrick Ewing and let him retire a Knick to open major cap space?

Ewing and Knicks brass regretted the trade with Seattle that took place after the 1999-2000 season. Wielding a no-trade clause, Ewing felt underappreciated, demanded a trade and gave Dave Checketts a list of one team — the Sonics. In the four-team, 12-player trade, the Knicks got back a junky haul of Glen Rice, Luc Longley, Travis Knight, Vernon Maxwell, Vladimir Stepania and Lazaro Borrell. Ewing played one nondescript year in Seattle, then another one with Orlando before retiring. If only the Knicks could have coaxed Ewing into one more season in New York, it would’ve been ideal for both, with Ewing becoming one of the few stars to play for one team — a la Kobe Bryant.

3. What if the Knicks amnestied Amar’e Stoudemire instead of Chauncey Billups after the 2011 lockout?

This became the classic second-guess — almost unfairly. The argument is the Knicks would’ve had extra cap space to then sign Chris Paul in 2012. Instead, GM Glen Grunwald amnestied the final $14 million year of an aging Billups’ contract to ink center Tyson Chandler — a key to Dallas’ 2011 championship. Chandler became an underrated force during “Linsanity’’ (they had great chemistry), then a bedrock piece to the 54-win season of 2012-13. Despite a history of bad knees, Stoudemire was emerging from an MVP-caliber season. Though he had $80 million left on his salary, no one expected Stoudemire’s knees to deteriorate so rapidly — as did his on-court relationship with Carmelo Anthony.

4. What if LeBron James signed with the Knicks in 2010?

If James brought along Dwyane Wade and Chris Bosh, the Knicks would’ve surely broken their title drought and become more revered than the 1970 and 1973 Knicks. But if James just paired himself with an ailing Stoudemire, it could’ve become a circus because King James doesn’t like to fall short.

5. What if owner James Dolan didn’t fire Glen Grunwald after the 54-win, 2012-13 season three days before training camp?

The move rocked head coach Mike Woodson, his Indiana compadre, and led to Steve Mills’ second stint at the Garden. The firing also later triggered the hiring of Phil Jackson. Since Grunwald’s puzzling firing, the Knicks haven’t returned to the playoffs.