Niners’ Nick Bosa ends holdout with record $170m contract extension

• 49ers star re-ups to become richest ever defensive player
• ESPN reports extension is worth $170m over five seasons

Nick Bosa's lengthy contract holdout ended four days before the start of the season for the San Francisco 49ers when he agreed to a contract extension that will make him the NFL's richest defensive player ever.

Coach Kyle Shanahan said Wednesday that the two sides agreed to the contract and that Bosa is on his way to the team facility. Now Shanahan is glad he can stop thinking about what it would be like for the Niners to open their season without their best defensive player.