Rough start to Cleveland's season -- Cy Young winner Shane Bieber has tested positive for COVID-19 ... but thankfully, he's said to be experiencing only "very, very mild symptoms."
Cleveland President Chris Antonetti announced Thursday the ace tested positive as he arrived to the team's spring training facility in Goodyear, AZ ... and is going through the proper protocols to ensure a safe return.
Antonetti added Bieber is expected to return to the team in a matter of days.
Bieber is the first big name out of spring training to test positive prior to the 2021 season .