Alex Rodriguez set another record for baseball’s highest contract, finalizing his $275 million, 10-year agreement with the Yankees yesterday.

A-Rod set the previous mark with his $252 million, 10-year deal with Texas in December 2000. Traded to the Yankees in 2004, he opted out of that contract October 28, during the final game of the World Series.

Yankees senior vice president Hank Steinbrenner said New York would not negotiate further with Rodriguez because his decision eliminated the $21.3 million subsidy the Yankees were to receive from Texas from 2008-10, a figure negotiated at the time of the trade.

But Rodriguez then approached the Yankees through a managing director at Goldman Sachs and negotiated his new deal in early November without agent Scott Boras.

“It seemed like the whole thing was a roller-coaster. It was very emotional,” Rodriguez said on a conference call. “All along, I knew I wanted to be a Yankee.”

The three-time MVP said opting out was “a mistake that was handled extremely poorly.”

“It was a huge debacle,” he said, calling the timing “distasteful and very inappropriate.”

Officials in the commissioner’s office were livid, and Boras quickly apologized. A-Rod said he told Boras how he felt.

“The one time we spoke, I conveyed that message,” he said.

Rodriguez said Boras gave him the impression the Yankees weren’t interested in bringing him back, which surprised him.

“Our goals were not aligned,” Rodriguez said. “It felt funny to me.” Rodriguez said he thought the move would be disclosed after the World Series. He said Boras still represents him — the two have known each other for 16 years — but with a 10-year deal already in place, their player-agent relationship is “all academic.”

“I made mistakes. I’ve got to look in the mirror. If I had to do it again, I would’ve called Hank from Day 1 and negotiated myself,” Rodriguez said.