Darrius Heyward-Bey's strained right hamstring has kept him from participating in drills. "His learning is good," coach Tom Cable said of Heyward-Bey. "He's a very bright guy, but that doesn't ever account for the reps that are needed to work." Heyward-Bey said he was running at 95 percent last week. "You want to be out there with the quarterback all the time," he said. "But you got to understand, we got two more weeks of OTAs, we got training camp, we got preseason. It's a lot of time, but you don't want to be too relaxed. "But I'm getting my mental reps, and a lot of the older guys are helping me out, so I'm right on time."