» December 7, 2001:
The Blue Jays trade P Billy Koch to the A's. In return, Toronto gets minor league 3B Eric Hinske and minor league P Justin Miller.
» August 4, 2002:
The Athletics defeat Detroit, 4–0, as Cory Lidle, Ricardo Rincon, Chad Bradford, and Billy Koch combine on the 1–hit shutout. Tiger OF Wendell Magee's single is the only Detroit safety.
» November 4, 2002: Toronto Blue Jays third baseman Eric Hinske is named Rookie of the Year in the American League, and Rockies pitcher Jason Jennings is named the National League's top rookie. Hinske, 25, was acquired from Oakland in the Billy Koch deal, and hit .279 with 24 homers. He had 122 points to finish ahead of Orioles pitcher Rodrigo Lopez (15–9) with 97 points. Jennings had 150 points to runner–up Brad Wilkerson with 59 points. Jennings was 4–1 in 2001, and posted a 16–8 record this season, including 9–4 at Coors Field. He is the first Rockie to win the award.
» December 3, 2002: The Athletics send P Billy Koch and two minor leaguers to the White Sox in exchange for P Keith Foulke, C Mark Johnson, minor league P Joe Valentine, and cash.