The two words that are driving head coaches batty and out of the business. Craig Bohl and Bob Nielson may have hung up their coaching cleats, but they’re not done making an impact on student-athletes. David Samson/The Forum“The consensus of the coaches is we need to get to one transfer portal window in terms of helping to create greater program continuity,” Nielson said this week. The spring window last year was April 16-25. There were more than 1,100 in the spring window.