The un-athletic display came in the first quarter of the Seahawks' 26-23 loss on Sunday at Levi's Stadium in Santa Clara, Calif.
Seattle began the game with a nine-play, 59-yard touchdown drive, capped off by a Doug Baldwin touchdown. Janikowski missed the extra point, giving the Seahawks a 6-0 lead.
He launched the ensuing kickoff into the arms of returner Richie James. The 49ers wide receiver caught the ball at the 3-yard-line. He ripped up the right flank, running out of several tackles before finding the open field.
James crossed the 50-yard-line before seeing he only had Janikowski in his way. The kicker ran toward his left, appearing to be going toward the returner, but he overran a tackle instead. The lackluster effort allowed James to cut inside and score a 97-yard touchdown.
Janikowski hit a 48-yard field goal attempt and was 2-for-3 on extra points in the loss. James was a seventh round pick by the 49ers in the 2018 NFL Draft. Sunday's score was the first touchdown of his career.