Brandon Maurer shook the nerves, went back to relying on his primary pitches and finally displayed why the Seattle Mariners felt the 22-year-old was ready to make the jump from Double-A to the majors. The result was a celebratory shower that left the rookie shivering. "He's going through another first right now," Seattle manager Eric Wedge noted as cheers emerged from the clubhouse. Dustin Ackley snapped a sixth-inning tie with his first RBI of the season, Maurer rebounded from a horrible start to throw six strong innings for his first career victory and the Mariners beat the Texas Rangers 4-3 on Sunday.