Denver is pleased with the pace of Walker's comeback from knee surgery but knows to take it slow with the former Packer this summer. Walker tore his ACL in the first game of last season and has been working steadily to get back to full speed. The Broncos gave up a second-round pick for him and hope he can provide the consistent threat opposite Rod Smith they've been lacking. If Walker is close to 100 percent, he'll be a huge addition for an offense that needs big-play capability.