"We're dedicating it to him, and we go out and battle like he's right beside us," left tackle Duane Brown added.
Linemen already wear "Quessenberry Strong" bracelets and plan to create T-shirts to raise awareness.
Quessenberry was placed on the NFL's Non-Football Injury (NFI) list this summer after being diagnosed with lymphoma. The 23-year-old offensive tackle told the Chronicle that his teammates' support buoys him during the fight.
"It's hard to put into words what it means to have the support of your brothers on the team. ... Truly, it's an honor," said Quessenberry, who recently returned to his home state of California. "I want to do them proud. I want to come back stronger and ... help these guys win, when I do come back eventually.
"This year, I got blindsided getting diagnosed with cancer. Just knowing that my teammates and my brothers (have) my back is truly something special."