SEATTLE — After Monday night’s loss in the national championship game, Washington Huskies receiver Ja’Lynn Polk announced Tuesday that he plans to enter the NFL draft. “For me, it really was a tough decision leaving my brothers,” Polk told Pete Thamel of ESPN.com. “Just knowing the opportunities of being able to make another run next year again. But I think this is the right time.” Polk, a Lufkin, Texas, native, played one year at Texas Tech before transferring to Washington, where he amassed 1,967 receiving yards, 115 receptions and 16 touchdown catches in the past three years. This season he…