The A's -- coming off a 2-1 trip to Cleveland -- entered the series 8 1/2 games behind first-place Texas in the standings, a club that has won five of its past seven and seemingly has no plans of stopping its successful ways.
"Obviously, they're the team ahead of us," Geren said. "It's big in that respect. I like the way we've been throwing the ball. If we continue with our great pitching and get runs for them, we'll do well. The goal is to put a dent in their lead. It's the biggest series you can get for August."
The A's realize wins are not only significant for gaining ground in the division but also in picking up momentum as they're set to face the likes of the Yankees and Red Sox in the next week. And although Geren said he hasn't spoken much to his players about the season-changing effect these three games could have, the skipper also mentioned a pep talk isn't necessary.
"This is the kind of series no motivational speaking needs to take place," he said. "They're very motivated for this series, and for the rest of the season. They know what they need to do."
The A's and Rangers entered the series even for the season at six games each. Texas will make one final visit to the Oakland Coliseum at the end of September.