Sources say the Metropolitan Sports Facilities Commission is assessing the viability of playing the 2011 season outdoors at TCF Bank Stadium at the University of Minnesota, the stadium that hosted the Vikings' game against the Chicago Bears when the Metrodome roof was damaged by heavy snow. The commission will deliver its findings to the Vikings in late January or early February. After reviewing the findings, owner Zigi Wilf will make a decision in consultation with the NFL on whether to play the 2011 season at the Metrodome or TCF Bank Stadium, according to team and league sources.