DALLAS (AP) _ The Cincinnati Reds finalized their trade Thursday to send first baseman Sean Casey to the Pittsburgh Pirates for left-hander Dave Williams.

The deal had been tentatively agreed to Tuesday, subject to physicals.

Casey is a three-time All-Star and career .305 hitter who was among the most popular players on the Reds. He batted .312 last year with nine homers and 58 RBIs. A year earlier, he matched his career high of 99 RBIs and hit 24 homers, one shy of his best.

The 31-year-old Casey was acquired by Cincinnati from Cleveland in March 1998 and has spent his entire major league career with the Reds except for six games with the Indians in 1997. He is owed $8.5 million next season.

Having grown up in suburban Pittsburgh, Casey hit the first home run at PNC Park, an 8-2 Cincinnati win in April 2001. He went 4-for-4 with a two-run homer, two-run double and five RBIs in that game. He has 10 homers and 52 RBIs in 99 career games against Pittsburgh.

Casey's season ended because of a concussion that occurred in a Sept. 16 game in PNC Park. As third baseman Edwin Encarnacion's throw pulled Casey off the bag at first, Humberto Cota's left elbow accidentally struck Casey in the face. Casey lay motionless for about 10 minutes before being taken off the field on a stretcher.

Williams was 10-11 with a 4.41 ERA in 25 starts this year after not being assured of a spot in the rotation until the final week of spring training. He was drafted by the Pirates in 1998 and has a 17-26 record and 4.41 ERA in four major league seasons, missing more than half of the 2002 season for shoulder surgery before spending the entire 2003 season in the minors.