The long grind of the regular season has built up to this moment. #6 Oregon State, 41-11 so far this year, wraps up their schedule this weekend. In three games against Air Force tonight through Saturday, the Beavers get three more chances to pad their postseason resume. This series also represents their last regular season home games in front of Beaver Nation at Goss Stadium in Corvallis. If all goes well, the orange & black could host a regional, or more. This piece spotlights three storylines to follow this weekend. Ethan Kleinschmit is this team's new pitching ace While Oregon State lost All-American starting pitcher Dax Whitney for the season , hope is not lost. Thankfully, they can still rely on fellow All-American starter Ethan Kleinschmit. The junior from Mt. Angel struggled in his first Friday appearance this season - allowing eight hits and three homers in a May Day defeat - but recovered nicely against Long Beach State last week. He stayed perfect through four innings.…