The veteran wide receiver is the only healthy player skipping the voluntary offseason workouts this week at Redskins Park.
"The last time I looked up the word 'voluntary,' it is his choice," Redskins coach Jay Gruden said Wednesday. "He's been in the league nine years I believe it is and he knows what type of shape he has to come in. Obviously, last year he pulled his hamstring, and people are gonna say he was out of shape, but he wasn't really. I think he'll be ready to go."
The 29-year-old Jackson has one year remaining on his contract, which includes a $500,000 bonus clause for attending 90 percent of the team's offseason workouts.
Last season, Jackson suffered the hamstring injury in the opener but returned after missing six games to finish the year with 30 receptions for 528 yards and four touchdowns.
Jackson is expected to be one of the primary receivers in a Washington offense that will have Kirk Cousins as the starting quarterback. The Redskins drafted wide receiver Josh Doctson from TCU in the first round last month and also return wideout Pierre Garcon and tight end Jordan Reed.
"DeSean will get here," Cousins said. "He was here the last few weeks and was able to work with us. He knows what's best for him and what he's gotta do to be ready this fall. I'm excited for whenever he does get here and expect to get a lot of work in."
Gruden isn't sure when he might see Jackson, who lives in California and has a newborn at home.
"He'll probably show up here, could be next week could be whenever," Gruden said.
Doctson did not participate in workouts because of a sore Achilles, but he could return next week.