Adam Dunn is in a pennant race at last, and what an impression he made on his new team as the September stretch run began. Dunn provided instant pop for the struggling Athletics, hitting a towering, two-run homer in his debut at-bat for Oakland to highlight a 6-1 win over the Seattle Mariners on Monday in a matchup of playoff contenders. ''We're going to take full advantage.'' Acquired a day earlier in a trade with the Chicago White Sox, the 6-foot-6, 285-pound Dunn immediately became an imposing presence in the middle of Oakland's order. His drive was a welcome sight for a team that just got swept in a four-game series by the AL West-leading Los Angeles Angels and was shut out for 29 straight innings. More...