Patriots tight end Rob Gronkowski made a volunteer appearance at a Belmont, Mass., elementary school as part of the NFL's "Play 60" initiative, and provided an update on his injured forearm.

"No cast. It's been a lot of weeks now; now I'm just in the rehab part of it," Gronkowski told Brian Lowe of Patriots.com. "Getting it better. Getting it stronger. Getting it totally healthy now. Just taking it day by day, basically, with the rehab. Week by week. Once I'm 100 percent healthy, I'm definitely going to grind, hit it, hit the upper body, get stronger, and get ready for the season."