"On Saturday, I will be playing in your honor, Jazmine," the tweeted Thursday.
Hopkins said he will donate his $29,000 playoff check to help pay for funeral costs and said he would join in the effort to bring Barnes' killer to justice.
"What I can do, that's nothing, that won't bring back a person," Hopkins said Thursday. "I'm not trying to make it out about me or anything like that. It's the least I could do."
Jazmine Barnes was killed when a man in a pickup truck pulled up next to Barnes' mother's car and started shooting. Jazmine's mother and three sisters were injured in the seemingly random attack.