Former West Coast Eagles star Daniel Kerr has been discovered in medical trouble on the streets of Kalgoorlie in Western Australia and attended to by police.

Nine News Perth reported on Wednesday night that it had seen images, which the network chose not to put to air but confirmed with police, of a man witnesses said was Mr Kerr, apparently unresponsive on Kalgoorlie's main Hannan Street.

Sources told Nine News the former Eagle, who finished second to Ben Cousins in the 2005 Brownlow Medal, was discovered by a member of the public in distress and requiring medical assistance just before 8am on Wednesday morning, AWST.

Police and ambulance officers attended the scene before Mr Kerr – who played 220 games for West Coast before his retirement in 2013 – was taken to Kalgoorlie Health Campus and treated for suspected alcohol poisoning before he discharged himself later in the day.