Sources: 

Mac Jones is setting his sights on a 2025 NFL comeback with the San Francisco 49ers, hoping to reignite his career under the guidance of head coach Kyle Shanahan.
Jones, who made the Pro Bowl as a rookie with the New England Patriots in 2021, experienced a downturn that led to his trade to the Jacksonville Jaguars in 2024. Now, he is optimistic about the 49ers' offensive system, which emphasizes timing, rhythm, and structure.
"I think explaining what the expectation of each play is and why they’re doing a certain play," Jones told SI.com, highlighting the clarity the 49ers' system provides.
"And everything’s based on timing and rhythm and also playing off structure. So, it has all three elements of quarterback play."The 49ers famously traded three first-round picks in the 2021 NFL draft to move up, initially sparking speculation it was to select Jones. While that did not happen, Jones now has the opportunity to learn from Shanahan, widely regarded as one of the league's best offensive minds.
Jones is aiming for a career revival similar to that of Sam Darnold, who managed to rejuvenate his NFL trajectory after early struggles. The 2025 season will be a critical test to see if Jones can harness the 49ers' system to become a starting quarterback once again.
"But he’s optimistic that time in the 49ers’ system can help him develop as a quarterback who might one day be a starter again."With a focus on timing and rhythm, Jones hopes the 49ers' approach will unlock his potential and restore his standing in the NFL.
Sources: 

Mac Jones aims to revive his NFL career in 2025 with the San Francisco 49ers, learning under coach Kyle Shanahan. After a rocky stint with the Patriots and Jaguars, Jones is optimistic that the 49ers' timing- and rhythm-based system can help him develop into a starting quarterback again.