The longtime kicker was ultimately replaced by Giorgio Tavecchio who played well in the absence of the 39-year-old.
Ironically enough, Janikowski, who turns 40 in March, was the only player on the team left from Gruden's first stint with the Raiders.
Last season, Janikowski agreed to take a million-dollar pay cut and then dealt with a back issue which cost him the entire season.More news: Man City's Pep Guardiola defends himself against Gary Neville criticism
One of the most controversial draft picks of late owner Al Davis, Janikowski was the No. 17 overall selection after being a two-time Lou Groza award victor at Florida State as the best kicker in college football.
A Pro Bowler in 2011, Janikowski was the last remaining Raiders player on the roster from Oakland's 2002 Super Bowl team. He played in a franchise-record 268 games in 18 seasons. In 2016, Janikowski made 82.9 percent of his field goal attempts.
Known for his big leg, Janikowski banged in 55 field goals from 50 yards or longer during his time in Oakland.
Janikowski's contract ended after this past season, as did Tavecchio's. He had 16 field goals in either the fourth quarter or overtime that were game-winners and finished his career 11th in scoring in National Football League history with 1,799 points.