A pair of AL West rivals kick off an early week set up in the Pacific Northwest. The Houston Astros are on the road as they travel to face the Seattle Mariners Monday night in the first of a four game series. Houston played the rubber game of their three game set at home against Texas Sunday: they lost 6-5 in 10 innings Saturday. Seattle had a chance at a sweep of the A?s as they took a 10-8 win in the middle game of the set Saturday. The Astros won the season series last year 14-5, going 7-2 at Safeco Field and 7-3 at Minute Maid Park.