KJ Hamler knows it’s been a quiet start to the season for him, but he’s ready to make some noise Sunday against San Francisco. The Broncos’ wideout, who was targeted once in Week 1 and was inactive in Week 2, is trending towards playing Week 3 at Empower Field. Hamler has been limited in practice this week, both due to the team’s ongoing caution in his return from last year’s serious knee/hip injuries, and also a groin injury. But Hamler said Thursday he feels “excellent” and vowed to bring “big plays and explosiveness” upon his return. “I’ve been doing good,…