WILLMAR — The Willmar baseball team found out what Little Falls learned earlier this week. The Fergus Falls Otters are on a roll. Seventh-seeded Fergus Falls upended No. 3 Willmar 6-1 on Thursday at Elsie Klemmetson Field. Fergus Falls, 10-11, got a complete-game pitching performance from Brody Krein. He struck out five, walked two and scattered seven hits. The Otters have won four straight, including a 3-2 win over second-seeded Little Falls to…