Mark McGwire's rookie home run record stood for 30 seasons.
Aaron Judge surpassed Big Mac's mark that was set in 1987 with his 49th and 50th home runs on Monday against Kansas City.
For the 25-year-old, ecilpsing the 50-homer mark could be just the start, according to McGwire.
"I see power and I see a very intimidating figure at home plate. And I see patience. I don't know if he knows how good he can be. Just watching him from afar and knowing hitting the way I do, he's something else," McGwire told the YES Network on Tuesday.
For those that might think McGwire would be disappointed to see his record fall, you would be wrong.
"I couldn't be happier. To sit back and watch him is something that I enjoy doing. New York has a superstar in waiting," McGwire said.
Could Judge ever surpass Barry Bonds' all-time single-season record of 73 home runs set in 2001? McGwire thinks it's possible.
"I'm telling you right now: watch out 73. These young home run hitters are coming up and doing special things," McGwire said.
No major leaguer has hit 60 or more home runs since 2001 when Bonds his 73 and Sammy Sosa hit 64. Marlins slugger Giancarlo Stanton has an MLB-leading 57 homers entering play on Tuesday.