Dave Rayner, Ricky Schmitt and Rhys Lloyd took turns kicking field goals and kickoffs for nearly 30 minutes following practice while Raiders coach Hue Jackson and special teams coach John Fassel watched.
The team is not expected to make a final decision at the position until Saturday for Sunday's game against rival Kansas City, a source told ESPN NFL Insider Adam Schefter.
"We'll see as we continue to move forward but my goal is to make sure I have enough players to play and healthy bodies that can get the job done," Jackson said before going to watch the kickers. "It's a huge part of our football team if (Janikowski) can't go. We'll get somebody that can. That's the way it goes."
Janikowski, who tied an NFL record with a 63-yard field goal earlier this season, did not show up on Oakland's injury report Wednesday but has not worked out since.
Jackson said Thursday that he thought Janikowski would be fine but backtracked a day later and listed the kicker as questionable.
Janikowski has hit 12 of 13 field goal attempts this season. Five of his kicks have been from 50 yards or longer, with his lone miss coming from 56 yards.
If he's unable to play Sunday against Kansas City, it could have a significant impact on Oakland's offense.
"With Sebastian out there in the field our offense just needs to get the ball across the 50 in certain situations," long snapper Jon Condo said. "That might have some effect on our offense and the driving range ... but we have one of the best punters in the league to kick it inside the 5-, 10-yard line."
Of the three kickers Oakland worked out, Rayner has the most experience. The 29-year-old has kicked for six teams in five years and most recently played for Detroit in 2010. Rayner, who has made 55 of 75 field goal attempts in his career, was cut by both the Lions and Dallas Cowboys this past preseason.
Schmitt, who was on the Raiders practice squad as a punter in 2008, made two of three field goals with San Francisco in 2009 but has not attempted one since.
Lloyd, a native of Dover, England, has spent time in training camps with both Carolina and the New York Giants.
FB Manase Tonga will remain in the starting lineup even though Richard Gordon has recovered from the hand injury that sidelined him for two games. Gordon, a tight end, had been filling in for starter Marcel Reece, who has missed the last three games with an ankle injury. ... The team said the game has been sold out, the Raiders' fourth straight sellout. ... MLB Rolando McClain did not practice and is questionable.
Information from The Associated Press was used in this report.