Speaking to Jerry McDonald of the Bay Area News Group, the 37-year-old kicker was upbeat about the changes he has seen in the team since Del Rio's arrival.
"The atmosphere, the way players are in meetings is totally different," Janikowski said. "[Del Rio] makes players relaxed, but he's demanding.
"In some other years, I wouldn't say players didn't care, but it's not like it is now. Jack's laid back, but he expects the best from you."
Janikowski has played for nine coaches since breaking in with the Raiders under