The move, which the team announced Tuesday, will give Oakland an offseason backup to Sebastian Janikowski.
Tavecchio played one preseason game for the Raiders last summer, kicking a pair of 47-yard field goals against Seattle. He has also spent time in training camps with San Francisco, Green Bay and Detroit.
His finished his college career at California with 256 points, ranking fifth on the school's all-time scoring list. He converted 48 of 64 field goal attempts and 112 of 120 extra points.