Welcome to the suddenly Roaring 2020s.

These are the boom times. With a new collective bargaining agreement in place after last offseason’s lockout, we have entered a new age of spending in baseball. Steve Cohen is leading the charge, but the Steinbrenner Yankees are not far behind and neither are the Phillies and Padres.

Of the eight biggest contracts by total dollars dished out in free agency (so excluding extensions) in Major League Baseball history, three (Aaron Judge, Trea Turner and Xander Bogaerts) are less than a week old, including the two largest of all time (Judge and Correa, who agreed to a 13-year, $350 million deal Tuesday night with the Giants, The Post’s Jon Heyman confirmed). More than $3 billion has been committed to free agents this offseason — and there are scores of free agents yet to sign. Two offseasons ago, teams handed out about $1.3 billion total to free agents.

Last offseason, the top three contracts (Corey Seager, Kris Bryant and Marcus Semien) totaled $682 million. This offseason, the top three contracts (Judge, Correa and Turner) have totaled $1.01 billion.