Boston ? Arizona right-hander Curt Schilling accepted a trade to Boston Friday after agreeing to a contract extension that could keep him with the Red Sox through the end of his career.

The teams agreed to the deal Monday, but the 37-year-old Schilling had to waive the no-trade clause in his current contract for it to go through. A deadline for negotiations between Schilling and the Red Sox was to expire at 5 p.m. Friday but it was extended for one day; they only needed a couple of hours.

“I want to be a part of bringing the first World Series in modern history to Boston,” Schilling said. “And hopefully more than one over the next four years.”

A baseball source, speaking on condition of anonymity, told The Associated Press that Schilling’s extension guarantees him $12.5 million in 2005 and $13 million in 2006. It also includes a $13 million option for 2007 that could become guaranteed if Schilling meets specified performance levels, the source said.

“Curt wasn’t out for every last dollar. Very far from it. He wanted to structure his deal so the Red Sox would be competitive for every year of his contract,” Red Sox general manager Theo Epstein said. “He deserves a lot of credit, because that’s a rare request coming from a player.”

Schilling spent 31/2 years in Arizona as co-ace with Randy Johnson, and the pair shared the 2001 World Series MVP award after leading the Diamondbacks to victory over the New York Yankees. Now Schilling will try to lead Boston to a title alongside Pedro Martinez in what could be baseball’s most formidable rotation.

The Red Sox sent Casey Fossum and righty Brandon Lyon to the Diamondbacks, along with minor league pitcher Jorge De La Rosa and a minor leaguer to be named.

Arizona is trying to cut its payroll from about $94 million to $80 million; Schilling is scheduled to earn $12 million in 2004.

For his career, Schilling is 163-117 with a 3.33 ERA and 2,542 strikeouts. He went 22-6 with 293 strikeouts and a 2.98 ERA in 2001 as the Diamondbacks won the championship, then followed with a 23-7 record, 316 strikeouts and 3.23 ERA the next year.