Thielen (hamstring) is optimistic about his odds of playing in Sunday's game against the Chiefs, Ben Goessling of the Minneapolis Star Tribune reports.
A limited participant in each practice this week, Thielen is listed as questionable for Sunday's game, with coach Mike Zimmer saying the Vikings likely will put the wide receiver through a pregame workout before a decision on his status is made, per Courtney Cronin of ESPN.com. Cold weather in Kansas City may make it a bit more difficult for Thielen to get his hamstring loose, but he's nonetheless bullish about his chances. A final word on Thielen's status may not come until the Vikings release their inactive list approximately 90 minutes before Sunday's 1 p.m. ET kickoff.