JC Tretter: NFLPA wants vaccinated players to be tested more frequently too; he conferred with concerned players Sunday night
Browns center, NFLPA president JC Tretter happy with offseason program progress: 'Players felt like they actually had a choice'
Browns center JC Tretter shoulders heavy responsibility of protecting players as president of NFL union
JC Tretter and NFLPA urging players to boycott in-person OTAs and minicamps amid ongoing pandemic
Tretter: Players wanted Browns vs Raiders game played
Browns to play QB Jacoby Brissett, other starters in final preseason game vs. Bears
Browns center and union president JC Tretter wants COVID-19 testing to continue – News-Herald
NFLPA president JC Tretter elaborates on offseason workout concerns - NBC Sports
Broncos briefs: Two veteran players push back on NFLPA president's call to eliminate offseason practices – Boulder Daily Camera