7 WWE Champions you didn't know wrestled for New Japan Pro Wrestling (NJPW)

#6 The Undertaker

Before he was the Deadman, he was 'Punisher' Dice Morgan.

During the Monday Night Wars, The Undertaker was commended for remaining loyal to the WWF, but yes, there was a time when the Deadman was a New Japan wrestler.

Working in WCW, the Phenom would compete for NJPW as part of an ongoing agreement between the two companies, wrestling under the name 'Punisher' Dice Morgan.

In 1990, Morgan did a three-week tour in the company, working alongside fellow huge names like Bam Bam Bigelow and Scott Hall.

Morgan and Hall even had a shot at becoming the IWGP Tag Team Champions, but were unsuccessful, and later that same year, the future-Deadman was released by WCW.

You know what came next: the WWF signed him, debuted him as The Undertaker at the 1990 Survivor Series and the Deadman has had one of the greatest careers in wrestling history.