Linebacker Dre Greenlaw speaks bluntly about his miserable year playing in Denver before securing his reunion with the San Francisco 49ers. The San Francisco 49ers have re-signed linebacker Dre Greenlaw to a one-year, $7.5 million contract after a brief stint with the Denver Broncos. Greenlaw also pointed out the difficulties of playing at high altitude, stating, “F—ing altitude. Since his return, Greenlaw has brought renewed energy to San Francisco's training camp. With Greenlaw back alongside Fred Warner, San Francisco aims to re-establish the aggressive, physical identity that once defined their elite defensive units.