Report: Aiyuk not in attendance at 49ers' minicamp

San Francisco 49ers wide receiver Brandon Aiyuk didn't report for the start of the team's mandatory minicamp on Tuesday as he seeks a new contract, according to NBC Bay Area Sports' Matt Maiocco.

The 26-year-old standout is subject to fines of up to $104, 259 over three missed days under the league's collective bargaining agreement, per Maiocco.

The Niners and Aiyuk have been in contract negotiations for months but have been unable to reach an agreement. The wideout is entering the fifth and final year of his rookie deal, which is valued at $14.1 million in 2024. San Francisco has the option to franchise tag Aiyuk if the two sides are unable to strike a deal by March 2025.

The framework for Aiyuk's new contract has changed significantly over the past month. The benchmark was believed to be close to the four-year extension worth around $120.01 million that the Detroit Lions struck with Amon-Ra St. Brown. Minnesota Vikings star Justin Jefferson eclipsed that mark on Monday when he agreed to a four-year, $140-million contract that tops all wideouts with an annual average salary of $35 million, per Over the Cap.

Aiyuk has established himself as an effective piece within the 49ers' offense since being selected in the 2020 draft. The former first-rounder recorded back-to-back 1,000-yard campaigns over the last two seasons and hauled in 75 receptions for 1,342 yards and seven touchdowns in 2023.

While Aiyuk awaits a new deal, star running back Christian McCaffrey was reportedly awarded a two-year extension after being named the 2023 Offensive Player of the Year.

Aiyuk joins Dallas Cowboys wideout CeeDee Lamb among a group of star receivers who have opted to stay away from their respective team's minicamp.