DAVENPORT, Iowa (AP) – Former Iowa football star Brett Greenwood is in an Iowa hospital after collapsing during a workout. A spokeswoman for Trinity Medical Center in Bettendorf says Greenwood was taken there in critical condition Friday. He’s since been transferred to University of Iowa Hospitals and Clinics in Iowa City. That hospital said it could not provide any information.  Greenwood collapsed while working out at Pleasant Valley High School in Bettendorf. Athletic director Randy Teymer told the newspaper that school medical personnel administered to him before he was taken by ambulance to Trinity Medical Center. The 23-year-old Greenwood was a four-year starter at Iowa. He signed as a free agent with the Pittsburgh Steelers, but was released in the final round of NFL cuts last weekend.