The Oakland Athletics' 1991 season was the team's 24th in Oakland, California. It was also the 91st season in franchise history. The team finished fourth in the American League West with a record of 84-78. The 1991 season saw the Athletics' American League dominance come to an abrupt end. Between 1988 and 1990, the team had won three American League pennants and one World Series title; in the process, they won a combined 306 regular season games. In light of these accomplishments, the Athletics were initially favored to win a fourth consecutive American League pennant. A fourth consecutive World Series appearance, however, was not to be, marking the 1991 Athletics a failed season. In 1991, poor pitching (from both the starting rotation and the bullpen) served to take the Athletics out of contention. From 1988 to 1990, the Athletics had posted a team earned run average (ERA) of roughly 3.24 (easily the American League's best over that span); in 1991, however, they posted a sickly team ERA of 4.57 (the American League's second-worst). Of particular note were the struggles of ace Dave Stewart, whose 1991 ERA (5.18) was more than twice his 1990 ERA (2.56). 1990 Cy Young Award winner Bob Welch fared almost as poorly; his earned run average swelled from 2.95 (1990) to 4.58 (1991). In 1990, he had won a league-high 27 games; in 1991, he won a mere 12. The Athletics' 1991 campaign, as such, is remembered mainly for the record-breaking exploits of Rickey Henderson. On May 1, he stole his 938th career base; in doing so, he succeeded Lou Brock as MLB's career stolen base leader. Henderson would end the 1991 season with 994 stolen bases. Oakland would return to contention in 1992 with a record of 96-66. The 1991 season still, however, marked the end of the Athletics as a dynastic power. The 1992 team failed to dominate the league in the manner that the 1988–90 teams had; following that team's six-game ALCS defeat to the Toronto Blue Jays, Oakland wouldn't reach the postseason until 2000. Offseason December 3, 1990: Willie Wilson was signed as a free agent by the Athletics. December 4, 1990: Darren Lewis and a player to be named later were traded by the Athletics to the San Francisco Giants for Ernest Riles. The Athletics completed the deal by sending Pedro Pena (minors) to the Giants on December 17. December 19,