Donnell has looked healthy and made plays during training camp, but he's still in a battle with Will Tye, and to a lesser extent Matt LaCosse, for the team's starting tight end job.
At 6-6, 265, Donnell has the red-zone size the team needs, while Tye stands only 6-2. But Donnell has struggled with ball security in the past, and he's not a good blocker. Tye probably has a slight edge, but this battle might go down to the wire this preseason.